Listing.javaimport java.util.Scanner;public class Listing { .pdf
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Listing.java import java.util.Scanner; public class Listing { //Declaring instance variables private String name; private int age; //Default constructor public Listing() { name=\" \"; age=0; } //parameterized Constructor public Listing(String name, int age) { super(); this.name = name; this.age = age; } //Getters and setters public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } //This input() method will take the inputs entered by the user. public void input() { //Scanner Object is used to get the data entered by the user Scanner sc=new Scanner(System.in); //Getting the user name System.out.print(\"Enter Name :\"); setName(sc.nextLine()); //Getting the Age System.out.print(\"Enter Age :\"); setAge(sc.nextInt()); } //This toString() method will displays the constents of the user. @Override public String toString() { System.out.println(\"Name :\"+getName()); System.out.println(\"Name :\"+getAge()); return \"\"; } } _____________________________________________________________ Driver.java public class Driver { public static void main(String[] args) { //Create an array of 3 Listing Objects Listing listing[]=new Listing[3]; //Creating Listing Objects and populating into an Array for(int i=0;i<3;i++) { listing[i]=new Listing(); System.out.println(\"Listing Object \"+(i+1)+\":\"); //Calling the input method which capture the data entered by the user listing[i].input(); } //Displaying the Listing objects in the Normal Order System.out.println(\"Displaying the Listing Objects in the Normal Order ::\"); for(int i=0;i<3;i++) { System.out.println(\"Listing Object \"+(i+1)+\":\"); listing[i].toString(); System.out.println(\"_____________________\"); } //Displaying the Listing objects in the Reverse Order System.out.println(\"Displaying the Listing Objects in the Reverse Order ::\"); for(int i=2;i>=0;i--) { System.out.println(\"Listing Object \"+(i+1)+\":\"); listing[i].toString(); System.out.println(\"_____________________\"); } } } _______________________________________________________ Output: Listing Object 1: Enter Name :Kane Williams Enter Age :27 Listing Object 2: Enter Name :John Mills Enter Age :23 Listing Object 3: Enter Name :Tim Rochey Enter Age :22 Displaying the Listing Objects in the Normal Order :: Listing Object 1: Name :Kane Williams Name :27 _____________________ Listing Object 2: Name :John Mills Name :23 _____________________ Listing Object 3: Name :Tim Rochey Name :22 _____________________ Displaying the Listing Objects in the Reverse Order :: Listing Object 3: Name :Tim Rochey Name :22 _____________________ Listing Object 2: Name :John Mills Name :23 _____________________ Listing Object 1: Name :Kane Williams Name :27 _____________________ _____________________________________________Thank You Solution Listing.java import java.util.Scanner; public class Listing { //Declaring instance variables private String n.
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![{
//Scanner Object is used to get the data entered by the user
Scanner sc=new Scanner(System.in);
//Getting the user name
System.out.print("Enter Name :");
setName(sc.nextLine());
//Getting the Age
System.out.print("Enter Age :");
setAge(sc.nextInt());
}
//This toString() method will displays the constents of the user.
@Override
public String toString() {
System.out.println("Name :"+getName());
System.out.println("Name :"+getAge());
return "";
}
}
_____________________________________________________________
Driver.java
public class Driver {
public static void main(String[] args) {
//Create an array of 3 Listing Objects
Listing listing[]=new Listing[3];
//Creating Listing Objects and populating into an Array
for(int i=0;i<3;i++)
{
listing[i]=new Listing();
System.out.println("Listing Object "+(i+1)+":");
//Calling the input method which capture the data entered by the user](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommended
Tested on EclipseBoth class should be in same package.pdf
Tested on Eclipse
Both class should be in same package
/***********UNMember class***********/
import java.util.Scanner;
public class UNMember {
/*data member declaration*/
private String name;
private int NUID;
private String netID;
private String collegeLocation;
Scanner input=new Scanner(System.in);
/*Default constructor*/
public UNMember() {
}
/*Parameterized constructor*/
public UNMember(String name, int nUID, String netID) {
setName(name);
setNUID(nUID);
setNetID(netID);
setCollegeLocation();
}
/*Getter and setter method of data member variable*/
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getNUID() {
return NUID;
}
public void setNUID(int nUID) {
NUID = nUID;
}
public String getNetID() {
return netID;
}
public void setNetID(String netID) {
this.netID = netID;
}
public String getCollegeLocation() {
return collegeLocation;
}
public void setCollegeLocation() {
String collegeLocation;
/*Prompt for college location*/
System.out.println(\"Please Enter the college Location\");
collegeLocation=input.nextLine();
this.collegeLocation = collegeLocation;
}
@Override
public String toString() {
return \"Name:\" + name.toUpperCase() + \"\ NUID=\" + NUID + \"\ NetID:\" +
netID.toUpperCase() + \"\ Campus Location:\" + collegeLocation.toUpperCase()
+ \"\ \";
}
}
/************UNStaff class*************/
import java.text.DecimalFormat;
public class UNStaff extends UNMember{
/*Member data variable declaration*/
private String position;
private double wage;
/*Parameterized constructor*/
public UNStaff(String position, double wage,String name,int NUID,String netID) {
super(name,NUID,netID);
setPosition(position);
setWage(wage);
}
/*Getter and Setter method of data member variable*/
public String getPosition() {
return position;
}
public void setPosition(String position) {
if(position.equals(\"\")|| position==null){
this.position=\"NOT SET\";
}else{
this.position = position;
}
}
public double getWage() {
return wage;
}
/*Set wage , if wage less then 9 then we are setting it to -1*/
public void setWage(double wage) {
if(wage<9){
this.wage=-1;
}else{
this.wage = wage;
}
}
/*ToString method*/
@Override
public String toString() {
String result=\"Position:\" + position.toUpperCase() + \"\ \";
if(this.wage==-1){
result+=\"Wage:NOT SET\";
}else{
result+=\"Wage:$\"+new DecimalFormat(\"##.00\").format(this.wage);
}
return super.toString()+result;
}
public static void main(String args[]){
UNStaff staff=new UNStaff(\"secretary\", 50.6, \"David\", 123, \"UN123\");
UNStaff staff1=new UNStaff(\"cleark\", 8, \"Sam\", 129, \"UN129\");
System.out.println(\"**************\");
System.out.println(staff.toString());
System.out.println(\"**************\");
System.out.println(staff1.toString());
}
}
/***************output*************/
Please Enter the college Location
california
Please Enter the college Location
Los Angeles
**************
Name:DAVID
NUID=123
NetID:UN123
Campus Location:CALIFORNIA
Position:SECRETARY
Wage.
Can someone help me with this code When I run it, it stops after th.pdf
Can someone help me with this code? When I run it, it stops after the output
Enter Student 1 Details
Name
I would just like to know what is incorrect with my code & how I can fix it.
Here is my code:
package studentclient;
import java.util.Scanner;
public class StudentClient {
public static void main(String[] args) {
Student s1;
Student s2;
s1 = new Student(\"Lisa\", \"111-11-111\", 3.0);
s2 = new Student(\"Jacob\", \"777-77-777\", 4.0);
System.out.println(\"Enter Student 1 Details\");
System.out.println(\"Name\");
Scanner sc=new Scanner(System.in);
String Name = sc.next();
System.out.println(\"Social Security number\");
String Ssn = sc.next();
System.out.println(\"GPA\");
double gpa = sc.nextDouble();
System.out.println(\"Enter Student 2 Details\");
System.out.println(\"Name\");
Name=sc.next();
System.out.println(\"social security number\");
Ssn=sc.next();
System.out.println(\"GPA\");
gpa=sc.nextDouble();
System.out.println(\"Student 1 deatils\");
System.out.println(\"name\"+s1.getName());
System.out.println(\"Social Secuirty Number:\"+s1.getSsn());
System.out.println(\"GPA:\"+s1.getGpa());
System.out.println(\"Student 2 details\");
System.out.println(\"name\"+s2.getName());
System.out.println(\"Social Security Number:\"+s2.getSsn());
System.out.println(\"GPA:\"+s2.getGpa());
if(s1 ==(s2))
System.out.println(\"Student details are equal\");
else
System.out.println(\"Student details are not equal\");
s2 = new Student(\"Jacob\", \"000-00-000\", 4.0);
System.out.println(\"Enter new details for Student 2\");
System.out.println(\"Name:\");
Name=sc.next();
s2.setName();
System.out.println(\"Social Security number\");
Ssn=sc.next();
s2.setSsn(Ssn);
System.out.println(\"GPA\");
gpa=sc.nextDouble();
s2.setGpa(gpa);
if(s1 ==(s2))
System.out.println(\"Student details are equal\");
else
System.out.println(\"Student details are not equal\");
}
}
package studentclient;
class Student {
String name;
String social_security_number;
double GPA;
public Student( String newName, String newSsn, double newGpa )
{
this.name=newName;
this.social_security_number=newSsn;
this.GPA=newGpa;
}
public String getName( )
{
return this.name;
}
public void setName( String newName )
{
this.name=newName;
}
public String getSsn( )
{
return this.social_security_number;
}
public void setSsn( String newSsn )
{
// Your code here
this.social_security_number=newSsn;
}
public double getGpa( )
{
return this.GPA;
}
public void setGpa( double newGpa )
{
if(newGpa<0 || newGpa>4)
System.out.println(\"Error! Gpa value should be in the range(0 to 4 ) only.\");
else
this.GPA=newGpa;
}
@Override
public String toString( )
{
return (\"name:\"+this.name+\" Social Security number:\"+this.social_security_number+ \"
GPA:\"+this.GPA);
}
public boolean equals( Student S )
{
boolean ans=false;
if(this.name.equals(S.name) && this.social_security_number.equals(S.social_security_number)
&&this.GPA==S.GPA)
{
ans=true;
}
return ans;
}
void setName() {
throw new UnsupportedOperationException(\"Not supported yet..
Teacher.javaimport java.util.Arrays; import java.util.Scanner;.pdf
Teacher.java
import java.util.Arrays;
import java.util.Scanner;
public class Teacher {
//Creating Arrays
String names[]=new String[5];
char grades[]=new char[5];
double tests[][]=new double[5][4];
double avgarr[]=new double[5];
Scanner sc=null;
//Default constructor
public Teacher() {
sc=new Scanner(System.in);
}
/*this method will get each student information
* and populates that information into an array
*/
public void getStudentsTestScore()
{
for(int i=0;i<5;i++)
{
//getting the name of each student
System.out.print(\"Enter Name of Student \"+(i+1)+\" :\");
names[i]=sc.next();
for(int j=0;j<4;j++)
{
//Getting the test score in each test of every student
System.out.print(\" Test \"+(j+1)+\" score :\");
tests[i][j]=sc.nextDouble();
}
System.out.println(\" \");
}
}
/* this method will display the grade of the student
* based on user entered name which is passed
* as parameter to this method
*/
public char getStudentGrade(String name)
{
char grade = 0;
double sum,avg=0.0;
for(int h=0;h<5;h++)
{
sum=0.0;
for(int m=0;m<4;m++)
{
//calculating the total score in all 4 tests of each student
sum+=tests[h][m];
}
//calculating average
avg=sum/4;
//Populating into an array
avgarr[h]=avg;
//based on the average test score corresponding grade will be given
if(avg>=90 && avg<=100)
{
grade=\'A\';
}
else if(avg>=80 && avg<=89)
{
grade=\'B\';
}
else if(avg>=70 && avg<=79)
{
grade=\'C\';
}
else if(avg>=60 && avg<=69)
{
grade=\'D\';
}
else if(avg<=59)
{
grade=\'F\';
}
grades[h]=grade;
}
//Getting the corresponding student grade
for(int i=0;i<5;i++)
if(names[i].equalsIgnoreCase(name))
{
grade=grades[i];
}
return grade;
}
/* This will return the average test score of a student
* whose name is passed as parameter to this method
*/
public double getStudentAvgTestScore(String name)
{
double sum=0.0,avg=0.0;
for(int i=0;i<5;i++)
if(names[i].equalsIgnoreCase(name))
{
for(int k=0;k<4;k++)
{
sum+=tests[i][k];
}
}
avg=sum/4;
return avg;
}
//toString(0 method displays each student name,average test score and grade
@Override
public String toString() {
for(int i=0;i<5;i++)
{
System.out.println(\"\ \ Student Name :\"+names[i]);
System.out.println(\"Average Test Score :\"+avgarr[i]);
System.out.println(\"Grade :\"+grades[i]);
}
return \"\";
}
}
___________________________________________
TestClass.java
import java.util.Scanner;
public class TestClass {
public static void main(String[] args) {
//Scanner class object is sued to read th inputs entered by the user.
Scanner sc=new Scanner(System.in);
//Creating Teacher class Object
Teacher t=new Teacher();
/*calling the method on the Teacher class
* Which will read the data of every student entered by the user
*/
t.getStudentsTestScore();
//Getting the name of the student for which he want to display the grade
System.out.print(\"Enter Student Name for Grade :\");
String name=sc.next();
//Displaying particular student\'s Average test score
System.out.println(name +\" Average test score is :\"+t.getStudentAvgTestScore(name));
//Dis.
public class Person { private String name; private int age;.pdf
public class Person
{
private String name;
private int age;
public Person()
{
name=\"\";
age=0;
}
/**
Create a person with a given name and age.
@param name the name
@param age the age
*/
public Person(String name, int age)
{
this.name = name;
this.age = age;
}
/**
Get the name.
@return the name
*/
public String getName()
{
return name;
}
/**
Change the name.
@param name the name
*/
public void setName(String name)
{
this.name = name;
}
/**
Get the age.
@return the age
*/
public int getAge()
{
return age;
}
/**
Change the age.
@param age the age
*/
public void setAge()
{
this.age = age;
}
/**
Convert person to string form.
*/
public String toString()
{
return \"Name: \" + name + \"\\t\" + \"Age: \" + age;
}
}
OUTPUT should look like this!
Solution
solution
package com.prt.test;
public class Person
{
protected String name;
protected int age;
public Person()
{
name=\"\";
age=0;
}
/**
Create a person with a given name and age.
@param name the name
@param age the age
*/
public Person(String name, int age)
{
this.name = name;
this.age = age;
}
/**
Get the name.
@return the name
*/
public String getName()
{
return name;
}
/**
Change the name.
@param name the name
*/
public void setName(String name)
{
this.name = name;
}
/**
Get the age.
@return the age
*/
public int getAge()
{
return age;
}
/**
Change the age.
@param age the age
*/
public void setAge()
{
this.age = age;
}
/**
Convert person to string form.
*/
public String toString()
{
return \"Name: \" + name + \"\\t\" + \"Age: \" + age;
}
}
package com.prt.test;
public class Student extends Person implements Comparable{
private int studentId;
private String major;
/**
* @return the studentId
*/
public int getStudentId() {
return studentId;
}
/**
* @param studentId the studentId to set
*/
public void setStudentId(int studentId) {
this.studentId = studentId;
}
/**
* @return the major
*/
public String getMajor() {
return major;
}
/**
* @param major the major to set
*/
public void setMajor(String major) {
this.major = major;
}
public Student(String name, int age, int studentId, String major) {
super(name, age);
this.studentId = studentId;
this.major = major;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return \"name:\" + name+ \"\\t\"+\"\\t\"+\"age:\"+ age+\"\\t\"+ \"studentId :\"+ studentId +
\"\\t\" +\" major:\"+ major;
}
public int compareTo(Student st){
if(studentId==st.studentId)
return 0;
else if(studentId>st.studentId)
return 1;
else
return -1;
}
}
package com.prt.test;
public class Instructor extends Person implements Comparable {
private double salary;
public Instructor(String name, int age, double salary) {
super(name, age);
this.salary = salary;
}
/**
* @return the salary
*/
public double getSalary() {
return salary;
}
/**
* @param salary
* the salary to set
*/
public void setSalary(double salary) {
this.salary = salary;
}
public int compareTo(Instructor is) {
if (salary == is.salary)
return 0;
else if (salary > is.salary)
return 1;
else
ret.
Create a class named Student that has the following member variables.pdf
Create a class named Student that has the following member variables: first name (string), last
name(string), student identification number(int), an integer array where the grades of all classes
are stored, grade point average (gpa) (float). Write appropriate constructor, mutator and accessor
functions for the class along with the following A function that inputs all values from the user
(except for gpa) A function that outputs the names and gpa of students
Solution
/* Java Programme for Grades Calculation */
import java.util.Scanner;
public class Student
{
//Private varibles declaration
private String firstName;
private String lastName;
private int sid;
private int[] grades= new int[10];
int[] tempgrades= new int[10];
int noc;
private float gpa=0;
//Constructor method
Scanner in=new Scanner(System.in); //scanner class object for reading input
public static void main(String[] args)
{
Student st=new Student(); //creating object and calling default constructor
st.readInput();
st.calgpa();
}
//Mutator for firstName
public void setfirstName(String firstName)
{
this.firstName = firstName;
}
//Mutator for lastName
public void setlastName(String lastName)
{
this.lastName = lastName;
}
//Mutator for sid
public void setsid(int sid)
{
this.sid = sid;
}
//Mutator for grades
public void setgrades(int[] grades)
{
this.grades = grades;
}
void readInput() //Function to read input data
{
System.out.println(\"Enter First Name\ \"); //Prompt for name
String temp=in.nextLine(); //reading name
setfirstName(temp); //calling mutator for firstName
System.out.println(\"Enter Last Name\ \"); //Prompt for last name
String temp1=in.nextLine(); //read last anme
setlastName(temp1); //calling mutator for lastName
System.out.println(\"Enter Student ID\ \"); //prompt for student id
int temp2=in.nextInt(); //read student id
setsid(temp2); //calling mutator for sid
System.out.println(\"Enter Number of classes ID\ \"); //Prompt for Number of classes
noc=in.nextInt(); //read Number of classes
System.out.println(\"Enter Grades of classes ID\ \"); //Prompt for Grades of classes
for(int i=0;i Gpa : \" + gpa+\"\ \"); //Dispaly output
}
}
Output :
javac Student.java //Compilation of java programme
java Student //running java programme
Sample output :
Enter First Name
Ashok
Enter Last Name
Kumar
Enter Student ID
101
Enter Number of classes ID
4
Enter Grades of classes ID
10
9
8
7
First Name : Ashok Last Name : Kumar Student Id : 101 --> Gpa : 8.5.
@author public class Person{ String sname, .pdf
/**
* @author
*
*/
public class Person
{
String sname, iname;
int fid, sid;
}
/**
* @author
*
*/
public class Student extends Person
{
String sname;
int sid;
int no_of_credits, tot_grade_pts;
/**
* @param sname
* @param sid
*/
public Student(String sname, int sid)
{
this.sname = sname;
this.sid = sid;
}
/**
* @return
*/
public String get_name()
{
return sname;
}
public int get_sid()
{
return sid;
}
public boolean two_equal(int sid)
{
if ((this.sid) == sid)
return true;
else
return false;
}
public void set_credits(int credits)
{
no_of_credits = credits;
}
public int get_credits()
{
return no_of_credits;
}
public void set_tot_gpts(int gpts)
{
tot_grade_pts = gpts;
}
public int get_tgpts()
{
return tot_grade_pts;
}
public float get_GPA()
{
return ((tot_grade_pts) / (no_of_credits));
}
}
/**
* @author
*
*/
public class Instructor extends Person
{
String iname;
int fid;
String dept;
/**
* @param iname
* @param fid
*/
public Instructor(String iname, int fid)
{
this.iname = iname;
this.fid = fid;
}
/**
* @param dept
*/
void set_dept(String dept)
{
this.dept = dept;
}
/**
* @return
*/
public String get_dept()
{
return dept;
}
}
import java.util.ArrayList;
/**
* @author
*
*/
public class Course
{
String cname, instructor_name;
int creg_code, max_students, no_of_students;
ArrayList reg_students = new ArrayList();
/**
* @param cname
* @param creg_code
* @param max_students
*/
Course(String cname, int creg_code, int max_students)
{
this.cname = cname;
this.creg_code = creg_code;
this.max_students = max_students;
}
/**
* @param instructor_name
*/
void set_instructor(String instructor_name)
{
this.instructor_name = instructor_name;
}
/**
* method to search student id
*
* @param sid
* @return
*/
public boolean search_student(int sid)
{
if (reg_students.contains(sid))
return true;
else
return false;
}
/**
* method to add student id
*
* @param sid
*/
public void add_student(int sid)
{
try {
if ((reg_students.size()) == max_students)
{
throw new MyException();
}
else
reg_students.add(sid);
}
catch (Exception e)
{
System.out.println(\"Course has maximum students\");
}
}
/**
* method to remove student id
*
* @param sid
*/
public void rem_student(int sid)
{
try {
if (reg_students.contains(sid))
reg_students.remove(new Integer(sid));
else
throw new MyException();
} catch (Exception e)
{
System.out.println(\"NO STUDENT FOUND WITH THE GIVEN id\");
}
}
}
/**
* @author
*
*/
public class MyException extends Exception
{
public MyException() {
// TODO Auto-generated constructor stub
super(\" Invalid Data\");
}
}
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Registrar
{
/**
* @param args
* @throws NumberFormatException
* @throws IOException
*/
public static void main(String args[]) throws NumberFormatException,
IOException
{
Course c1 = new Course(\"default_course\", 123, 10);
int ch, regcode, max_stu, sid;
String cname, sname;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
do {
System..
Production.javapublic class Production { Declaring instance.pdf
Production.java
public class Production {
//Declaring instance variables
private String title;
private String director;
private String writer;
//Parameterized constructor
public Production(String title, String director, String writer) {
super();
this.title = title;
this.director = director;
this.writer = writer;
}
//Setters and getters.
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDirector() {
return director;
}
public void setDirector(String director) {
this.director = director;
}
public String getWriter() {
return writer;
}
public void setWriter(String writer) {
this.writer = writer;
}
//display() method which displays the Instance variable values
public void display()
{
System.out.println(\"Title: \" + this.title);
System.out.println(\"Director: \" + this.director);
System.out.println(\"Writer: \" + this.writer);
}
//toString() method is used to display the contents of an object
@Override
public String toString() {
return \"Title :\" + title + \"\ Director :\" + director
+ \"\ Writer :\" + writer;
}
}
___________________________________________
Film.java
public class Film extends Production{
//Declaring instance variables
private int boxOfficeGross;
//Parameterized constructor
public Film(String title, String director, String writer, int boxOfficeGross) {
super(title, director, writer);
this.boxOfficeGross = boxOfficeGross;
}
//Setters and getters.
public int getBoxOfficeGross() {
return boxOfficeGross;
}
public void setBoxOfficeGross(int boxOfficeGross) {
this.boxOfficeGross = boxOfficeGross;
}
//display() method which displays the Instance variable values
public void display()
{
System.out.println(\"BoxOfiiceGross: \" + this.boxOfficeGross);
}
//toString() method is used to display the contents of an object
@Override
public String toString() {
return super.toString()+\"\ BoxOfficeGross :\" + boxOfficeGross+\"\ \";
}
}
_______________________________________________
Play.java
public class Play extends Production {
//Declaring instance variables
private int performances;
//Parameterized constructor
public Play(String title, String director, String writer, int performances) {
super(title, director, writer);
this.performances = performances;
}
//Setters and getters.
public int getPerformances() {
return performances;
}
public void setPerformances(int performances) {
this.performances = performances;
}
//display() method which displays the Instance variable values
public void display()
{
System.out.println(\"Performances: \" + this.performances);
}
//toString() method is used to display the contents of an object
@Override
public String toString() {
return super.toString()+\"\ Performances :\" + performances+\"\ \";
}
}
_______________________________________________
Musical.java
public class BobsTerribleTests
{
public static void main(String[] args)
{
//Creating an Film Object by passing parameters
Film titanic = new Film(\"Titanic\", \"James Cameron\", \"James Cameron\.
Recommended
Tested on EclipseBoth class should be in same package.pdf
Tested on Eclipse
Both class should be in same package
/***********UNMember class***********/
import java.util.Scanner;
public class UNMember {
/*data member declaration*/
private String name;
private int NUID;
private String netID;
private String collegeLocation;
Scanner input=new Scanner(System.in);
/*Default constructor*/
public UNMember() {
}
/*Parameterized constructor*/
public UNMember(String name, int nUID, String netID) {
setName(name);
setNUID(nUID);
setNetID(netID);
setCollegeLocation();
}
/*Getter and setter method of data member variable*/
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getNUID() {
return NUID;
}
public void setNUID(int nUID) {
NUID = nUID;
}
public String getNetID() {
return netID;
}
public void setNetID(String netID) {
this.netID = netID;
}
public String getCollegeLocation() {
return collegeLocation;
}
public void setCollegeLocation() {
String collegeLocation;
/*Prompt for college location*/
System.out.println(\"Please Enter the college Location\");
collegeLocation=input.nextLine();
this.collegeLocation = collegeLocation;
}
@Override
public String toString() {
return \"Name:\" + name.toUpperCase() + \"\ NUID=\" + NUID + \"\ NetID:\" +
netID.toUpperCase() + \"\ Campus Location:\" + collegeLocation.toUpperCase()
+ \"\ \";
}
}
/************UNStaff class*************/
import java.text.DecimalFormat;
public class UNStaff extends UNMember{
/*Member data variable declaration*/
private String position;
private double wage;
/*Parameterized constructor*/
public UNStaff(String position, double wage,String name,int NUID,String netID) {
super(name,NUID,netID);
setPosition(position);
setWage(wage);
}
/*Getter and Setter method of data member variable*/
public String getPosition() {
return position;
}
public void setPosition(String position) {
if(position.equals(\"\")|| position==null){
this.position=\"NOT SET\";
}else{
this.position = position;
}
}
public double getWage() {
return wage;
}
/*Set wage , if wage less then 9 then we are setting it to -1*/
public void setWage(double wage) {
if(wage<9){
this.wage=-1;
}else{
this.wage = wage;
}
}
/*ToString method*/
@Override
public String toString() {
String result=\"Position:\" + position.toUpperCase() + \"\ \";
if(this.wage==-1){
result+=\"Wage:NOT SET\";
}else{
result+=\"Wage:$\"+new DecimalFormat(\"##.00\").format(this.wage);
}
return super.toString()+result;
}
public static void main(String args[]){
UNStaff staff=new UNStaff(\"secretary\", 50.6, \"David\", 123, \"UN123\");
UNStaff staff1=new UNStaff(\"cleark\", 8, \"Sam\", 129, \"UN129\");
System.out.println(\"**************\");
System.out.println(staff.toString());
System.out.println(\"**************\");
System.out.println(staff1.toString());
}
}
/***************output*************/
Please Enter the college Location
california
Please Enter the college Location
Los Angeles
**************
Name:DAVID
NUID=123
NetID:UN123
Campus Location:CALIFORNIA
Position:SECRETARY
Wage.
Can someone help me with this code When I run it, it stops after th.pdf
Can someone help me with this code? When I run it, it stops after the output
Enter Student 1 Details
Name
I would just like to know what is incorrect with my code & how I can fix it.
Here is my code:
package studentclient;
import java.util.Scanner;
public class StudentClient {
public static void main(String[] args) {
Student s1;
Student s2;
s1 = new Student(\"Lisa\", \"111-11-111\", 3.0);
s2 = new Student(\"Jacob\", \"777-77-777\", 4.0);
System.out.println(\"Enter Student 1 Details\");
System.out.println(\"Name\");
Scanner sc=new Scanner(System.in);
String Name = sc.next();
System.out.println(\"Social Security number\");
String Ssn = sc.next();
System.out.println(\"GPA\");
double gpa = sc.nextDouble();
System.out.println(\"Enter Student 2 Details\");
System.out.println(\"Name\");
Name=sc.next();
System.out.println(\"social security number\");
Ssn=sc.next();
System.out.println(\"GPA\");
gpa=sc.nextDouble();
System.out.println(\"Student 1 deatils\");
System.out.println(\"name\"+s1.getName());
System.out.println(\"Social Secuirty Number:\"+s1.getSsn());
System.out.println(\"GPA:\"+s1.getGpa());
System.out.println(\"Student 2 details\");
System.out.println(\"name\"+s2.getName());
System.out.println(\"Social Security Number:\"+s2.getSsn());
System.out.println(\"GPA:\"+s2.getGpa());
if(s1 ==(s2))
System.out.println(\"Student details are equal\");
else
System.out.println(\"Student details are not equal\");
s2 = new Student(\"Jacob\", \"000-00-000\", 4.0);
System.out.println(\"Enter new details for Student 2\");
System.out.println(\"Name:\");
Name=sc.next();
s2.setName();
System.out.println(\"Social Security number\");
Ssn=sc.next();
s2.setSsn(Ssn);
System.out.println(\"GPA\");
gpa=sc.nextDouble();
s2.setGpa(gpa);
if(s1 ==(s2))
System.out.println(\"Student details are equal\");
else
System.out.println(\"Student details are not equal\");
}
}
package studentclient;
class Student {
String name;
String social_security_number;
double GPA;
public Student( String newName, String newSsn, double newGpa )
{
this.name=newName;
this.social_security_number=newSsn;
this.GPA=newGpa;
}
public String getName( )
{
return this.name;
}
public void setName( String newName )
{
this.name=newName;
}
public String getSsn( )
{
return this.social_security_number;
}
public void setSsn( String newSsn )
{
// Your code here
this.social_security_number=newSsn;
}
public double getGpa( )
{
return this.GPA;
}
public void setGpa( double newGpa )
{
if(newGpa<0 || newGpa>4)
System.out.println(\"Error! Gpa value should be in the range(0 to 4 ) only.\");
else
this.GPA=newGpa;
}
@Override
public String toString( )
{
return (\"name:\"+this.name+\" Social Security number:\"+this.social_security_number+ \"
GPA:\"+this.GPA);
}
public boolean equals( Student S )
{
boolean ans=false;
if(this.name.equals(S.name) && this.social_security_number.equals(S.social_security_number)
&&this.GPA==S.GPA)
{
ans=true;
}
return ans;
}
void setName() {
throw new UnsupportedOperationException(\"Not supported yet..
Teacher.javaimport java.util.Arrays; import java.util.Scanner;.pdf
Teacher.java
import java.util.Arrays;
import java.util.Scanner;
public class Teacher {
//Creating Arrays
String names[]=new String[5];
char grades[]=new char[5];
double tests[][]=new double[5][4];
double avgarr[]=new double[5];
Scanner sc=null;
//Default constructor
public Teacher() {
sc=new Scanner(System.in);
}
/*this method will get each student information
* and populates that information into an array
*/
public void getStudentsTestScore()
{
for(int i=0;i<5;i++)
{
//getting the name of each student
System.out.print(\"Enter Name of Student \"+(i+1)+\" :\");
names[i]=sc.next();
for(int j=0;j<4;j++)
{
//Getting the test score in each test of every student
System.out.print(\" Test \"+(j+1)+\" score :\");
tests[i][j]=sc.nextDouble();
}
System.out.println(\" \");
}
}
/* this method will display the grade of the student
* based on user entered name which is passed
* as parameter to this method
*/
public char getStudentGrade(String name)
{
char grade = 0;
double sum,avg=0.0;
for(int h=0;h<5;h++)
{
sum=0.0;
for(int m=0;m<4;m++)
{
//calculating the total score in all 4 tests of each student
sum+=tests[h][m];
}
//calculating average
avg=sum/4;
//Populating into an array
avgarr[h]=avg;
//based on the average test score corresponding grade will be given
if(avg>=90 && avg<=100)
{
grade=\'A\';
}
else if(avg>=80 && avg<=89)
{
grade=\'B\';
}
else if(avg>=70 && avg<=79)
{
grade=\'C\';
}
else if(avg>=60 && avg<=69)
{
grade=\'D\';
}
else if(avg<=59)
{
grade=\'F\';
}
grades[h]=grade;
}
//Getting the corresponding student grade
for(int i=0;i<5;i++)
if(names[i].equalsIgnoreCase(name))
{
grade=grades[i];
}
return grade;
}
/* This will return the average test score of a student
* whose name is passed as parameter to this method
*/
public double getStudentAvgTestScore(String name)
{
double sum=0.0,avg=0.0;
for(int i=0;i<5;i++)
if(names[i].equalsIgnoreCase(name))
{
for(int k=0;k<4;k++)
{
sum+=tests[i][k];
}
}
avg=sum/4;
return avg;
}
//toString(0 method displays each student name,average test score and grade
@Override
public String toString() {
for(int i=0;i<5;i++)
{
System.out.println(\"\ \ Student Name :\"+names[i]);
System.out.println(\"Average Test Score :\"+avgarr[i]);
System.out.println(\"Grade :\"+grades[i]);
}
return \"\";
}
}
___________________________________________
TestClass.java
import java.util.Scanner;
public class TestClass {
public static void main(String[] args) {
//Scanner class object is sued to read th inputs entered by the user.
Scanner sc=new Scanner(System.in);
//Creating Teacher class Object
Teacher t=new Teacher();
/*calling the method on the Teacher class
* Which will read the data of every student entered by the user
*/
t.getStudentsTestScore();
//Getting the name of the student for which he want to display the grade
System.out.print(\"Enter Student Name for Grade :\");
String name=sc.next();
//Displaying particular student\'s Average test score
System.out.println(name +\" Average test score is :\"+t.getStudentAvgTestScore(name));
//Dis.
public class Person { private String name; private int age;.pdf
public class Person
{
private String name;
private int age;
public Person()
{
name=\"\";
age=0;
}
/**
Create a person with a given name and age.
@param name the name
@param age the age
*/
public Person(String name, int age)
{
this.name = name;
this.age = age;
}
/**
Get the name.
@return the name
*/
public String getName()
{
return name;
}
/**
Change the name.
@param name the name
*/
public void setName(String name)
{
this.name = name;
}
/**
Get the age.
@return the age
*/
public int getAge()
{
return age;
}
/**
Change the age.
@param age the age
*/
public void setAge()
{
this.age = age;
}
/**
Convert person to string form.
*/
public String toString()
{
return \"Name: \" + name + \"\\t\" + \"Age: \" + age;
}
}
OUTPUT should look like this!
Solution
solution
package com.prt.test;
public class Person
{
protected String name;
protected int age;
public Person()
{
name=\"\";
age=0;
}
/**
Create a person with a given name and age.
@param name the name
@param age the age
*/
public Person(String name, int age)
{
this.name = name;
this.age = age;
}
/**
Get the name.
@return the name
*/
public String getName()
{
return name;
}
/**
Change the name.
@param name the name
*/
public void setName(String name)
{
this.name = name;
}
/**
Get the age.
@return the age
*/
public int getAge()
{
return age;
}
/**
Change the age.
@param age the age
*/
public void setAge()
{
this.age = age;
}
/**
Convert person to string form.
*/
public String toString()
{
return \"Name: \" + name + \"\\t\" + \"Age: \" + age;
}
}
package com.prt.test;
public class Student extends Person implements Comparable{
private int studentId;
private String major;
/**
* @return the studentId
*/
public int getStudentId() {
return studentId;
}
/**
* @param studentId the studentId to set
*/
public void setStudentId(int studentId) {
this.studentId = studentId;
}
/**
* @return the major
*/
public String getMajor() {
return major;
}
/**
* @param major the major to set
*/
public void setMajor(String major) {
this.major = major;
}
public Student(String name, int age, int studentId, String major) {
super(name, age);
this.studentId = studentId;
this.major = major;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return \"name:\" + name+ \"\\t\"+\"\\t\"+\"age:\"+ age+\"\\t\"+ \"studentId :\"+ studentId +
\"\\t\" +\" major:\"+ major;
}
public int compareTo(Student st){
if(studentId==st.studentId)
return 0;
else if(studentId>st.studentId)
return 1;
else
return -1;
}
}
package com.prt.test;
public class Instructor extends Person implements Comparable {
private double salary;
public Instructor(String name, int age, double salary) {
super(name, age);
this.salary = salary;
}
/**
* @return the salary
*/
public double getSalary() {
return salary;
}
/**
* @param salary
* the salary to set
*/
public void setSalary(double salary) {
this.salary = salary;
}
public int compareTo(Instructor is) {
if (salary == is.salary)
return 0;
else if (salary > is.salary)
return 1;
else
ret.
Create a class named Student that has the following member variables.pdf
Create a class named Student that has the following member variables: first name (string), last
name(string), student identification number(int), an integer array where the grades of all classes
are stored, grade point average (gpa) (float). Write appropriate constructor, mutator and accessor
functions for the class along with the following A function that inputs all values from the user
(except for gpa) A function that outputs the names and gpa of students
Solution
/* Java Programme for Grades Calculation */
import java.util.Scanner;
public class Student
{
//Private varibles declaration
private String firstName;
private String lastName;
private int sid;
private int[] grades= new int[10];
int[] tempgrades= new int[10];
int noc;
private float gpa=0;
//Constructor method
Scanner in=new Scanner(System.in); //scanner class object for reading input
public static void main(String[] args)
{
Student st=new Student(); //creating object and calling default constructor
st.readInput();
st.calgpa();
}
//Mutator for firstName
public void setfirstName(String firstName)
{
this.firstName = firstName;
}
//Mutator for lastName
public void setlastName(String lastName)
{
this.lastName = lastName;
}
//Mutator for sid
public void setsid(int sid)
{
this.sid = sid;
}
//Mutator for grades
public void setgrades(int[] grades)
{
this.grades = grades;
}
void readInput() //Function to read input data
{
System.out.println(\"Enter First Name\ \"); //Prompt for name
String temp=in.nextLine(); //reading name
setfirstName(temp); //calling mutator for firstName
System.out.println(\"Enter Last Name\ \"); //Prompt for last name
String temp1=in.nextLine(); //read last anme
setlastName(temp1); //calling mutator for lastName
System.out.println(\"Enter Student ID\ \"); //prompt for student id
int temp2=in.nextInt(); //read student id
setsid(temp2); //calling mutator for sid
System.out.println(\"Enter Number of classes ID\ \"); //Prompt for Number of classes
noc=in.nextInt(); //read Number of classes
System.out.println(\"Enter Grades of classes ID\ \"); //Prompt for Grades of classes
for(int i=0;i Gpa : \" + gpa+\"\ \"); //Dispaly output
}
}
Output :
javac Student.java //Compilation of java programme
java Student //running java programme
Sample output :
Enter First Name
Ashok
Enter Last Name
Kumar
Enter Student ID
101
Enter Number of classes ID
4
Enter Grades of classes ID
10
9
8
7
First Name : Ashok Last Name : Kumar Student Id : 101 --> Gpa : 8.5.
@author public class Person{ String sname, .pdf
/**
* @author
*
*/
public class Person
{
String sname, iname;
int fid, sid;
}
/**
* @author
*
*/
public class Student extends Person
{
String sname;
int sid;
int no_of_credits, tot_grade_pts;
/**
* @param sname
* @param sid
*/
public Student(String sname, int sid)
{
this.sname = sname;
this.sid = sid;
}
/**
* @return
*/
public String get_name()
{
return sname;
}
public int get_sid()
{
return sid;
}
public boolean two_equal(int sid)
{
if ((this.sid) == sid)
return true;
else
return false;
}
public void set_credits(int credits)
{
no_of_credits = credits;
}
public int get_credits()
{
return no_of_credits;
}
public void set_tot_gpts(int gpts)
{
tot_grade_pts = gpts;
}
public int get_tgpts()
{
return tot_grade_pts;
}
public float get_GPA()
{
return ((tot_grade_pts) / (no_of_credits));
}
}
/**
* @author
*
*/
public class Instructor extends Person
{
String iname;
int fid;
String dept;
/**
* @param iname
* @param fid
*/
public Instructor(String iname, int fid)
{
this.iname = iname;
this.fid = fid;
}
/**
* @param dept
*/
void set_dept(String dept)
{
this.dept = dept;
}
/**
* @return
*/
public String get_dept()
{
return dept;
}
}
import java.util.ArrayList;
/**
* @author
*
*/
public class Course
{
String cname, instructor_name;
int creg_code, max_students, no_of_students;
ArrayList reg_students = new ArrayList();
/**
* @param cname
* @param creg_code
* @param max_students
*/
Course(String cname, int creg_code, int max_students)
{
this.cname = cname;
this.creg_code = creg_code;
this.max_students = max_students;
}
/**
* @param instructor_name
*/
void set_instructor(String instructor_name)
{
this.instructor_name = instructor_name;
}
/**
* method to search student id
*
* @param sid
* @return
*/
public boolean search_student(int sid)
{
if (reg_students.contains(sid))
return true;
else
return false;
}
/**
* method to add student id
*
* @param sid
*/
public void add_student(int sid)
{
try {
if ((reg_students.size()) == max_students)
{
throw new MyException();
}
else
reg_students.add(sid);
}
catch (Exception e)
{
System.out.println(\"Course has maximum students\");
}
}
/**
* method to remove student id
*
* @param sid
*/
public void rem_student(int sid)
{
try {
if (reg_students.contains(sid))
reg_students.remove(new Integer(sid));
else
throw new MyException();
} catch (Exception e)
{
System.out.println(\"NO STUDENT FOUND WITH THE GIVEN id\");
}
}
}
/**
* @author
*
*/
public class MyException extends Exception
{
public MyException() {
// TODO Auto-generated constructor stub
super(\" Invalid Data\");
}
}
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Registrar
{
/**
* @param args
* @throws NumberFormatException
* @throws IOException
*/
public static void main(String args[]) throws NumberFormatException,
IOException
{
Course c1 = new Course(\"default_course\", 123, 10);
int ch, regcode, max_stu, sid;
String cname, sname;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
do {
System..
Production.javapublic class Production { Declaring instance.pdf
Production.java
public class Production {
//Declaring instance variables
private String title;
private String director;
private String writer;
//Parameterized constructor
public Production(String title, String director, String writer) {
super();
this.title = title;
this.director = director;
this.writer = writer;
}
//Setters and getters.
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDirector() {
return director;
}
public void setDirector(String director) {
this.director = director;
}
public String getWriter() {
return writer;
}
public void setWriter(String writer) {
this.writer = writer;
}
//display() method which displays the Instance variable values
public void display()
{
System.out.println(\"Title: \" + this.title);
System.out.println(\"Director: \" + this.director);
System.out.println(\"Writer: \" + this.writer);
}
//toString() method is used to display the contents of an object
@Override
public String toString() {
return \"Title :\" + title + \"\ Director :\" + director
+ \"\ Writer :\" + writer;
}
}
___________________________________________
Film.java
public class Film extends Production{
//Declaring instance variables
private int boxOfficeGross;
//Parameterized constructor
public Film(String title, String director, String writer, int boxOfficeGross) {
super(title, director, writer);
this.boxOfficeGross = boxOfficeGross;
}
//Setters and getters.
public int getBoxOfficeGross() {
return boxOfficeGross;
}
public void setBoxOfficeGross(int boxOfficeGross) {
this.boxOfficeGross = boxOfficeGross;
}
//display() method which displays the Instance variable values
public void display()
{
System.out.println(\"BoxOfiiceGross: \" + this.boxOfficeGross);
}
//toString() method is used to display the contents of an object
@Override
public String toString() {
return super.toString()+\"\ BoxOfficeGross :\" + boxOfficeGross+\"\ \";
}
}
_______________________________________________
Play.java
public class Play extends Production {
//Declaring instance variables
private int performances;
//Parameterized constructor
public Play(String title, String director, String writer, int performances) {
super(title, director, writer);
this.performances = performances;
}
//Setters and getters.
public int getPerformances() {
return performances;
}
public void setPerformances(int performances) {
this.performances = performances;
}
//display() method which displays the Instance variable values
public void display()
{
System.out.println(\"Performances: \" + this.performances);
}
//toString() method is used to display the contents of an object
@Override
public String toString() {
return super.toString()+\"\ Performances :\" + performances+\"\ \";
}
}
_______________________________________________
Musical.java
public class BobsTerribleTests
{
public static void main(String[] args)
{
//Creating an Film Object by passing parameters
Film titanic = new Film(\"Titanic\", \"James Cameron\", \"James Cameron\.
Code to copy Person.java .pdf
Code to copy:
/******************** Person.java **********************/
// Create a class Person
publicclass Person
{
// Declare variables
private String name;
private MyDate birthdate; // This is a date based on a Person\'s birthday
// Create accessor method for the name
public String getName()
{
return name;
}
// Create mutator method for name
publicvoid setName(String name)
{
this.name = name;
}
// Create accessor method for the name
public MyDate getBirthdate()
{
return birthdate;
}
// Create mutator method for name
publicvoid setBirthdate(MyDate birthdate)
{
this.birthdate = birthdate;
}
// Create a parameter constructor
public Person(String name, int pp, int kk, int vv)
{
this(name, new MyDate(pp, kk, vv));
}
// Create a parameter constructor
public Person(String name, MyDate birthday)
{
this(name);
this.birthdate = birthday;
}
// Create a parameter constructor
public Person(String name) {
this.name = name;
}
// Create to string method to display person data
@Override
public String toString() {
return \"Person [name=\" + name + \", birthdate=\" + birthdate + \"]\";
}
}
/******************** MyDate.java **********************/
// Create a class named MyDate
class MyDate
{
// Declare variables
privateint day;
privateint month;
privateint year;
// Create a default constructor
public MyDate(int month, int day, int year)
{
this.day = day;
this.month = month;
this.year = year;
}
// Create a compareTo method to compare the date objects
int compareTo(MyDate obj)
{
if(obj.day==this.day && obj.month==this.month && obj.year==this.year)
{
return 0;
}
elseif(obj.year>this.year)
{
return 1;
}
elseif(obj.year > this.year && obj.month > this.month)
{
return 1;
}
elseif(obj.year > this.year && obj.month > this.month && obj.day==this.day)
{
return 1;
}
else
return -1;
}
// Create a toString() method to display the date
@Override
public String toString()
{
return \"MyDate [day=\" + day + \", month=\" + month + \", year=\" + year + \"]\";
}
}
/******************** PersonSort.java **********************/
// import statements
import java.util.*;
import java.io.*;
// Create a class PersonSort
publicclass PersonSort implements Comparator
{
// Create compare method to compare two objects
@Override
publicint compare(Person o1, Person o2)
{
return 0;
}
// Create a main method to test the program
publicstaticvoid main(String [] args)
{
// Declare variables
String line;
String fileName=\"dataFile.txt\";
String data=\"\";
// Create a array list for the person class
ArrayList person= new ArrayList();
// Create a try block to handle the run time exceptions
try
{
// Create an object for the FileReader class
FileReader fileReader = new FileReader(fileName);
BufferedReader bufferedReader = new BufferedReader(fileReader);
// Create a for loop to read the data in the file dataFile.txt
while ((line = bufferedReader.readLine()) != null)
{
data+=line;
}
}
// Create a catch block to catch run time exceptions.
catch (FileNotFoundException ex)
{
System.out.println(\"Unable to op.
BasicPizza.javapublic class BasicPizza { Declaring instance .pdf
BasicPizza.java
public class BasicPizza {
//Declaring instance variables
String type;
String crust;
String ingredients;
double cost;
//Default Constructor
public BasicPizza() {
super();
}
//Parameterized constructor
public BasicPizza(String type) {
super();
this.type = type;
}
//Setters and Getters
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getCrust() {
return crust;
}
public void setCrust(String crust) {
this.crust = crust;
}
public String getIngredients() {
return ingredients;
}
public void setIngredients(String ingredients) {
this.ingredients = ingredients;
}
public double getCost() {
return cost;
}
public void setCost() {
this.cost = 5;
}
//toString() method is used to display the contents of the Object.inside it.
@Override
public String toString() {
return \"BasicPizza [type=\" + type + \", crust=\" + crust + \", ingredients=\"
+ ingredients + \", cost=\" + cost + \"]\";
}
}
________________________________________________________________
LiFiCheese.java
public class LiFiCheese extends BasicPizza{
//Declaring instance variables
private String crust;
private double cost;
private String ingredients;
//Default constructor
public LiFiCheese() {
super(\"Cheese\");
this.cost=5;
}
//Setters and getters
public void setCrust()
{
this.crust=\"thin\";
}
public String getCrust()
{
return crust;
}
public double getCost() {
return cost;
}
public void setCost(double cost) {
}
public String getIngredients() {
return ingredients;
}
public void setIngredients(String ingredients) {
this.ingredients = ingredients;
}
//toString() method is used to display the contents of the Object.inside it.
@Override
public String toString() {
System.out.println(\"You Ordered :\");
System.out.println(getType());
setCrust();
System.out.println(getCrust());
System.out.println(\"Total Cost of :\"+getCost());
return \"\";
}
}
__________________________________________________________________________
LiFiPizza.java
import java.util.Scanner;
public class LiFiPizza extends BasicPizza {
//Declaring instance variables
private String type;
private double cost;
private String crust;
private String ingredients;
//Default constructor
public LiFiPizza()
{
super();
this.type = \"Meat\";
this.cost=5;
}
//Setters and getters
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public double getCost() {
return cost;
}
public void setCost() {
this.cost = this.cost+2;
}
public String getCrust() {
return crust;
}
public void setCrust(String crust) {
if(crust.equals(\"Thin\"))
{
this.crust=\"Thin\";
}
else if(crust.equals(\"Thick\"))
{
this.crust=\"Thick\";
}
}
public String getIngredients() {
return ingredients;
}
public void setIngredients(String ingredients) {
this.ingredients = ingredients;
}
//toString() method is used to display the contents of the Object.inside it.
@Override
public String toString() {
System.out.println(\"You Ordered :\");
System.out.println(getType());
System.ou.
assignmentTwoCar.javaassignmentTwoCar.javapackage assignmentTw.docx
assignmentTwo/Car.javaassignmentTwo/Car.javapackage assignmentTwo;
// incomplete starter code for assignment two programming 1, sem 2 2014
// author: Kathleen Keogh version 1, incomplete. September 2014
publicclassCarextendsVehicle{
// instance variables
privateint numSeats, numDoors;
privateboolean hatch, tintedWindows;
publicCar(){
}
publicCar(int _numSeats,int _numDoors,boolean _hatch,boolean _tintedWindows){
// insert appropriate initialisation code here based on the parameters provided
}
// get and set methods for each car instance variable
publicint getNumSeats(){
return numSeats;
}
publicboolean setNumSeats(int _numSeats){
returntrue;// change this based on validation
}
publicint getNumDoors(){
return1;// change this to return appropriate value
}
publicvoid setNumDoors(){
}
publicboolean getHatch(){
returntrue;// change this to return the appropriate value
}
publicvoid setHatch(boolean _hatch){
}
publicboolean getTintedWindows(){
returntrue;// update this to return the appropriate value
}
publicvoid setTintedWindows(boolean _tintedWindows){
}
// toString method
publicString toString(){
// insert code here to appropriately return a string of data for this car, use superclass methods where appropriate
return("Car. Make "+ getMake());// change this to return more than just the make
}
}
assignmentTwo/Garage.javaassignmentTwo/Garage.javapackage assignmentTwo;
// Author, Version 1. Starter Code: Kathleen Keogh September 2014
// Author, Version 2. :
// Garage class is for a garage that contains a number of vehicles
publicclassGarage{
//instance variables
Vehicle vehicleList[];
int maxVehicles=10;// default maximum number of vehicles is 10
int currsize;
publicGarage(){// constructor with no parameters
vehicleList =newVehicle[maxVehicles];
currsize=0;
}
publicGarage(int _numMaxVehicles){// constructor with one parameter - maximum number of vehicles for garage
maxVehicles = _numMaxVehicles;
vehicleList =newVehicle[maxVehicles];
currsize =0;
}
// TODO: add get and set methods
// TODO: add toString() method
// TODO: add other methods including addVehicle, sortVehicles
}
assignmentTwo/Rectangle.javaassignmentTwo/Rectangle.javapackage assignmentTwo;
publicclassRectangleextendsShapes{
double length, width;// extra instance variables associated with Rectangle particularly
publicRectangle(){// constructor to create an 'empty' triangle
super("","",0,0);
length =0.0;//initialise length and width to zero for new rectangle
width =0.0;
}
publicRectangle(double initLength,double initWidth,String initName,String initColour,double xCoord,double yCoord){
super(initName, initColour, xCoord, yCoord);// use constructor from super class: Shapes
setLength(initLength);// initialise length to provided value
setWidth(initWidth);
}
publicboolean setLength(double _length){// mutator method to set length to new value
if(_length >0.0){// validate length is positi ...
Repeat Programming Project 2 in Chapter 5. This time, add the follow.pdf
Repeat Programming Project 2 in Chapter 5. This time, add the following four constructor
methods: one for each instance variable, one with two parameters for the two instance variables,
and a default constructor. Be sure that each constructor sets all the instance variables. write a
driver program to test each of the methods, including each of the four constructors and at least
one true or false case for each of the test method.
this is the code that i have to add four constructor methods to
import java.util.*;
public class PersonImproved// Counter is the name of the class and i saved it in a file named
PersonImproved.
{
//Data members
private String name;
private int age;
public void readInput()
{
Scanner keyboard = new Scanner(System.in);
System.out.println(\"What is the person\'s name?\");// This gets the program ready for
keyboard input by telling us that there is a new scanner called keyboard, that is accepting user
input.
name = keyboard.nextLine();
System.out.println(\"What is the person\'s age?\");
age = keyboard.nextInt();
while (age < 0)
{
System.out.println(\"Age cannot be negative.\");
System.out.println(\"Reenter age:\");
age = keyboard.nextInt();
}
}
public void writeOutput()
{
System.out.println(\"Name = \" + name);
System.out.println(\"Age = \" + age);
}
//method to set non negative age
public void set(String newName, int newAge)
{
name = newName;
if (newAge >= 0)
age = newAge;
else
{
System.out.println(\"ERROR: Used a negative age.\");
System.exit(0);
}
}
//method to setting name
public void setName(String newName)
{
name = newName;
}
//method to set age
public void setAge(int newAge)
{
if (newAge >= 0)
age = newAge;
else
{
System.out.println(\"ERROR: Used a negative age.\");
System.exit(0);
}
} //to get name
public String getName()
{
return name;
}
public int getAge()
{
return age;
}
/*Boolean tests for if two persons are equal (same name and age), if two persons
have the same name, if two persons have the same age, if one person is older
than another, and if one person is younger than another.*/
public boolean equals(PersonImproved another)
{
return(this.name.equalsIgnoreCase(another.name)
&& this.getAge() == another.getAge());
}
public boolean isSameName(PersonImproved another)
{
return(this.name.equalsIgnoreCase(another.name));
}
public boolean isSameAge(PersonImproved another)
{
return(this.getAge() == another.getAge());
}
public boolean isOlderThan(PersonImproved another)
{
return(this.getAge() > another.getAge());
}
public boolean isYoungerThan(PersonImproved
another)
{
return(this.getAge() < another.getAge());
}
}
and this is the test file
public class PersonCh6Test
{
public static void main(String[] args)
{
System.out.println();
System.out.println(\"Test case 1: default constructor and\");
System.out.println(\"writeOutput() method.\");
System.out.println();
PersonCh6 secretAgent1 = new PersonCh6();
System.out.println(\"Results of default constructor:\");
System.out.println(\"Should be name = \\\"No name\\\" and\");
S.
So Far I have these two classes but I need help with my persontest c.pdf
So Far I have these two classes but I need help with my persontest class:
The next step is to add method calls for the accessor methods after each input:
//Reading and updating values
System.out.print(\"\ Enter Person Name: \");
person1.setPersonName(sc.nextLine());
System.out.println(\"You entered: \" + person1.getPersonName());
Call the accessor function each time you ask for input, after capturing that input. Then repeat for
a second Person, only this time call the constructor that takes the student id as a parameter.
7 import java.util.Scanner;
8
9 class PersonTest
10 {
11 //Main method
12 public static void main(String args[])
13 {
14 Scanner sc = new Scanner(System.in);
15
16 //Creating object
17 Persons_Information person1 = new Persons_Information();
18
19 //Reading and updating values
20 System.out.print(\"\ Enter Person Name: \");
21 person1.setPersonName(sc.nextLine());
22
23 System.out.print(\"\ Enter Current Address: \");
24 person1.setCurrentAdress(sc.nextLine());
25
26 System.out.print(\"\ Enter Permanent Address: \");
27 person1.setpermanentAdress(sc.nextLine());
28
29 System.out.print(\"\ Enter ID number: \");
30 person1.setIdNumber(sc.nextInt());
31
32 sc.nextLine();
33
34 System.out.print(\"\ Enter Birth Date: \");
35 person1.setBirthDate(sc.nextLine());
36
37
38 System.out.print(\"\ Enter Person Age: \");
39 person1.setPersonAge(sc.nextInt());
40
41
42 System.out.print(\"\ Enter Entry Year: \");
43 person1.setEntryYear(sc.nextInt());
44
45
46 System.out.print(\"\ Enter Total Years: \");
47 person1.setTotalYears(sc.nextInt());
48
49 //Printing person 1 details
50 System.out.println(\"\ Person 1: \ \" + person1.toString());
51 }
52 }
Solution
Persons_Information.java
public class Persons_Information {
//Declaring instance variables
private String personName;
private String currentAdress;
private String permanentAdress;
private int idNumber;
private String birthDate;
private int personAge;
private int entryYear;
private int totalYears;
//Zero argumented constructor
public Persons_Information()
{
}
//Parameterized constructor
public Persons_Information(int idNumber) {
this.idNumber = idNumber;
}
//Getters and setters
public String getPersonName() {
return personName;
}
public void setPersonName(String personName) {
this.personName = personName;
}
public String getCurrentAdress() {
return currentAdress;
}
public void setCurrentAdress(String currentAdress) {
this.currentAdress = currentAdress;
}
public String getPermanentAdress() {
return permanentAdress;
}
public void setPermanentAdress(String permanentAdress) {
this.permanentAdress = permanentAdress;
}
public int getIdNumber() {
return idNumber;
}
public void setIdNumber(int idNumber) {
this.idNumber = idNumber;
}
public String getBirthDate() {
return birthDate;
}
public void setBirthDate(String birthDate) {
this.birthDate = birthDate;
}
public int getPersonAge() {
return personAge;
}
public void setPersonAge(int personAge) {
this.personAge = personAge;
}
public int getEntryYe.
Create a Code that will add an Add, Edi, and Delete button to the GU.pdf
Create a Code that will add an Add, Edi, and Delete button to the GUI like bellow.
public class Student {
private String studentID;
private String studentEmail;
private String studentFirstName;
private String studentLastName;
/**
* @param studentID
* @param studentEmail
* @param studentFirstName
* @param studentLastName
*/
public Student(String studentID, String studentEmail, String studentFirstName,
String studentLastName) {
this.studentID = studentID;
this.studentEmail = studentEmail;
this.studentFirstName = studentFirstName;
this.studentLastName = studentLastName;
}
/**
* @return the studentID
*/
public String getStudentID() {
return studentID;
}
/**
* @param studentID
* the studentID to set
*/
public void setStudentID(String studentID) {
this.studentID = studentID;
}
/**
* @return the studentEmail
*/
public String getStudentEmail() {
return studentEmail;
}
/**
* @param studentEmail
* the studentEmail to set
*/
public void setStudentEmail(String studentEmail) {
this.studentEmail = studentEmail;
}
/**
* @return the studentFirstName
*/
public String getStudentFirstName() {
return studentFirstName;
}
/**
* @param studentFirstName
* the studentFirstName to set
*/
public void setStudentFirstName(String studentFirstName) {
this.studentFirstName = studentFirstName;
}
/**
* @return the studentLastName
*/
public String getStudentLastName() {
return studentLastName;
}
/**
* @param studentLastName
* the studentLastName to set
*/
public void setStudentLastName(String studentLastName) {
this.studentLastName = studentLastName;
}
}
------------------------------------------------------------------------------------------------------
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
public class JTableExample extends JFrame {
public JTableExample() {
// headers for the table
String[] columns = new String[] { \"Email\", \"First Name\", \"Last Name\" };
Student[] students = {
new Student(\"S123\", \"sri3(AT).com\", \"Srinu\", \"Vasu\"),
new Student(\"S124\", \"sri4(AT).com\", \"Rajesh\", \"Kumar\"),
new Student(\"S125\", \"sri5(AT).com\", \"Kumar\", \"Suresh\"),
new Student(\"S126\", \"sri6(AT).com\", \"Balaji\", \"kumar\") };
// actual data for the table in a 2d array
Object[][] data = new Object[students.length][3];
for (int i = 0; i < data.length; i++) {
data[i][0] = students[i].getStudentEmail();
data[i][1] = students[i].getStudentFirstName();
data[i][2] = students[i].getStudentLastName();
}
// create table with data
JTable table = new JTable(data, columns);
// add the table to the frame
this.add(new JScrollPane(table));
this.setTitle(\"Student Manager\");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.pack();
this.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new JTableExample();
}
});
}
} Student Manager Email sri3@gmail.com sri4@gmail.com sri5@gmail.com sri6@gmail com
Last Name Firs.
Kotlin Data Model
2017/10/26 Android Taipei 分享
透過 Data Model 的演進，了解 Kotlin 的優點，並開始導入 Kotlin
現今 Data Model 的趨勢為以下三點:
1. 自動產生 (Code Generation)
2. Immutable Object
3. Null-safety
了解如何透過 Kotlin Data Classes 達到以上三點要求
Demo Project
https://github.com/ch8908/KotlinDataClass
java question Fill the add statement areaProject is to wo.pdf
java question: \"Fill the add statement area\"
Project is to work with stacks.
package p2;
public class Coordinate {
public int x;
public int y;
public Coordinate( int x, int y ) {
this.x = x;
this.y = y;
}
public String toString() {
return \"(\" + this.x + \",\" + this.y + \")\";
}
@Override
public boolean equals( Object object ) {
if( object == null ) {
return false;
}
if( ! Coordinate.class.isAssignableFrom( object.getClass() )) {
return false;
}
final Coordinate other = (Coordinate) object;
return this.x == other.x && this.y == other.y;
}
}
package p2;
public class Coordinate {
public int x;
public int y;
public Coordinate( int x, int y ) {
this.x = x;
this.y = y;
}
public String toString() {
return \"(\" + this.x + \",\" + this.y + \")\";
}
@Override
public boolean equals( Object object ) {
if( object == null ) {
return false;
}
if( ! Coordinate.class.isAssignableFrom( object.getClass() )) {
return false;
}
final Coordinate other = (Coordinate) object;
return this.x == other.x && this.y == other.y;
}
}
package p2;
import java.util.Vector;
public class Maze {
private char[][] maze;
private int height;
private int width;
/**
* Create a new Maze of the specified height and width, initializing every
* location as empty, with a \' \'.
**/
public Maze( int width, int height ) {
// ADD STATEMENTS HERE
}
/**
* Mutator to allow us to set the specified Coordinate as blocked,
* marking it with a \'X\'
**/
public void setBlocked( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Mutator to allow us to set the specified Coordinate as having been visited,
* marking it with a \'*\'
**/
public void setVisited( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Mutator to allow us to set the specified Coordinate as part of the path solution,
* marking it with a \'.\'
**/
public void setPath( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Returns the character at the locatio specified by the Coordinate
**/
public char at( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Returns a Coordinate array containing all Coordinates that are clear around
* the specified coordinate.
**/
public Coordinate[] clearAround( Coordinate coord ) {
Vector vector = new Vector();
// ADD STATEMENTS HERE
// Look at each of the locations around the specified Coordinate, and add it
// to the vector if it is clear (i.e. a space)
return vector.toArray( new Coordinate[0] );
}
/**
* Returns a Coordinate that provides the entrance location in this maze.
**/
public Coordinate start() {
return new Coordinate( 0, 1 );
}
/**
* Returns a Coordinate that provides the exit location from this maze.
**/
public Coordinate end() {
// ADD STATEMENTS HERE
}
/**
* The toString() method is responsible for creating a String representation
* of the Maze. See the project specification for sample output. Note that
* the String representation adds numbers across the top and side of the Maze
* to show the Coordinates of each cell in the maze.
**/
public String toString() {
StringBuilder buffer =.
operating system linux,ubuntu,Mac Geometri.pdf
//operating system linux,ubuntu,Mac
/*********************GeometricObject.java**********************/
public abstract class GeometricObject {
private String color = \"white\";
private boolean filled;
// default constructure
public GeometricObject() {
super();
// TODO Auto-generated constructor stub
}
// construct a Geometric Object
// parameterized constructure
public GeometricObject(String color, boolean filled) {
this.color = color;
this.filled = filled;
}
/** Getter method for color */
public String getColor() {
return color;
}
/** Setter method for color */
public void setColor(String color) {
this.color = color;
}
/**
* Getter method for filled. Since filled is boolean, so the gret method
* name is isFilled
*/
public boolean isFilled() {
return filled;
}
/** Setter method for filled */
public void setFilled(boolean filled) {
this.filled = filled;
}
/** Abstract method for FindArea */
public abstract double findArea();
/** Abstract method for findPerimeter */
public abstract double findPerimeter();
}
/*****************************Octagon.java**************/
public class Octagon extends GeometricObject implements Cloneable, Comparable {
private double side;
/** construct a Octagon with specified side */
public Octagon(double side) {
super();
this.side = side;
}
/** Implement the abstract method findArea in GeometricObject */
@Override
public double findArea() {
double area = (2 + 4 / Math.sqrt(2)) * side * side;
return area;
}
/** Implement the abstract method findArea in findPerimeter */
@Override
public double findPerimeter() {
double perimeter = 8 * side;
return perimeter;
}
/** Implement the compareTo method in Comparable interface */
@Override
public int compareTo(Object o) {
// TODO Auto-generated method stub
return 0;
}
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
/*******************App.java*******************/
public class App {
public static void main(String[] args) {
Octagon a1 = new Octagon(5);//creating object of octagon
System.out.println(\"Area of a1 is \" + a1.findArea());
System.out.println(\"Perimeter of a1 is \" + a1.findPerimeter());
Object a2;
try {
a2 = a1.clone();
String result = (a1.compareTo(a2) == 0) ? \"a1 and its clone a2 have the same area\"
: \"a1 and its clone a2 have different areas\";
System.out.println(\"Compare a1 and its clone a2:\ \\t \" + result);
System.out.println(\"Hashcode of a1: \" + a1.hashCode());
System.out.println(\"Hashcode of a2: \" + a2.hashCode());
System.out.println(\"Displaying a1: \" + a1);
System.out.println(\"Displaying a2: \" + a2);
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
}
}
/*****************output***************/
gopal@gopal:~/Desktop/chegg$ javac GeometricObject.java
gopal@gopal:~/Desktop/chegg$ javac Octagon.java
gopal@gopal:~/Desktop/chegg$ javac App.java
gopal@gopal:~/Desktop/chegg$ java App
Area of a1 is 120.71067811865476
Perimeter of a1 is 40.0
Compare a1 and its clone a2:
a1 and its clone a2 have the same area
.
when I compile to get the survey title the overload constructor asks.docx
when I compile to get the survey title the overload constructor asks for title name input else the default constructor sets a default name. My code ask for the title and after I enter it hangs until I enter it again
import java.util.Scanner;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
//package surveyproject;
public class Survey {
//declare variables
private static int respondentID;
public String surveyTitle;
public int initial_menu_Choice;
public int[][] ansArray = new int [3][3];
public String[] questArray = new String [3];
Scanner scan = new Scanner(System.in);
//default constructor
public Survey(){
surveyTitle = "Customer Survey";
}
//constructor with parameter
public Survey(String title){
respondentID = 0;
surveyTitle = title;
}
//method to get survey title
public String getSurveyTitle(){
return surveyTitle;
}
//method to get respondent ID
public int getRespondentID(){
return respondentID;
}
//method to generate respondent ID
public int generateRespondentID(){
//increments the respondent ID
respondentID++;
return respondentID;
}
public void setIntialMenuChoice(int inti_menu_choice){
initial_menu_Choice = inti_menu_choice;
}
//display survey results
public void displaySurveyResults(){
//print name of survey
//print ansArray
System.out.println("Survey: "+ surveyTitle);
System.out.println("Results of the survey: ");
System.out.print("Respondent ID| Q1\tQ2\tQ3 \n");
for(int i = 0; i < 3; i++){
System.out.print(" " + i + " | ");
for(int j = 0; j < 3; j++){
System.out.print(ansArray[i][j]+"\t");
}
System.out.println("\n");
}
}
public void displayQuestionStats(int questNum){
//display response entered for 'questNum'
System.out.println("Question stats for Question: "+questNum+" "+questArray[questNum-1]);
for(int i = 0; i < 3; i++){
System.out.println(ansArray[i][questNum-1]);
}
}
void enterQuestions(){
Scanner scan = new Scanner(System.in);
//user will enter 3 questions to be stored in string array
System.out.println("Enter 3 questions to create a survey");
for(int i = 0; i < 3; i++){
System.out.println("Enter question "+(i+1)+":");
questArray[i] = scan.next();
}
}
public void logResponse(int id, int questNum, int response){
//enter response in the matrix
ansArray[id][questNum] = response;
}
//user to fill in the survey questions
public void completeSurvey(int id){
System.out.println("Respondent "+ id+ " is taking survey");
Scanner inp = new Scanner(System.in);
int resp ;
System.out.println("Answer each question with number between 1 to 5");
for(int i=0; i<3; i++){
System.out.print("Question "+(i+1)+":");
//pres.
Overview You are tasked with writing a program called Social Security.pdf
Overview You are tasked with writing a program called Social Security that prompts the user to
enter the data (name and date-ofbirth)for a collection of people. The program will then process
this collection (array) of People (objects we create in another file) to determine who qualifies for
Social Security benefits. Specifications For our Social Security program we will need two java
files 1. Person java The person class which stores the data for a specific individual 2.
SocialSecurity.java (The driver) Details for these two class files appear below. Person ava UML
diagram name: String birthdate: LocalDate Person0 Person (newName: String, month: int, day:
int, year: int) NetName newName: String) void getName(): String set BirthDate month int, day:
int, year int) void get BirthDate 0 LocalDate toString(): String calculate Age(myBirth
LocalDate) int Person ava method description Two constructors 1. A Default constructor that
creates a Person whose name and birthdate are set to null. 2. A parameterized constructor that
accepts a String representation of the name, and three integers corresponding to the month, day,
and year in which the person was born. Setters and getters for the two instance variables. A
toString0 method that prints the person in the form dob
Solution
import java.time.LocalDate;
import java.time.Period;
import java.time.format.DateTimeFormatter;
import java.util.Scanner;
class Person {
String name;
LocalDate birthdate;
public Person() {
super();
}
public Person(String name, int month, int day, int year) {
super();
this.name = name;
this.birthdate = LocalDate.of(year, month, day);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public LocalDate getBirthdate() {
return birthdate;
}
public void setBirthdate(int month, int day, int year) {
this.birthdate = LocalDate.of(year, month, day);
}
@Override
public String toString() {
DateTimeFormatter formatter = DateTimeFormatter.ofPattern(\"MM/dd/yyyy\");
birthdate.format(formatter);
return \"Person [name=\" + name + \", birthdate=\" + birthdate + \"]\";
}
public int calculateAge() {
return Period.between(birthdate, LocalDate.now()).getYears();
}
public void qualifySSN() {
if(this.calculateAge()>66)
System.out.println(\"Qualifies for Social Security Benifits\");
else
System.out.println(\"Doesnot qualifies for Social Security Benefits\");
}
}
public class SocialSecurity {
public static void main(String[] args) {
if (args.length > 1)
System.out.println(\"Invalid number of command line arguments\");
int num = Integer.parseInt(args[0]);
Person[] p = new Person[num];
Scanner in = new Scanner(System.in).useDelimiter(\"\\\ \");
;
for (int i = 0; i < num; i++) {
System.out.println(\"enter persons name\");
String name = in.next();
System.out.println(\"enter date of birth in the format Month Day Year\");
String dob = in.next();
String[] temp = dob.split(\" \");
p[i] = new Person(name, Integer.parseInt(temp[0]), Integer.parseInt(temp[1]),
Integer.pa.
define a class name Employee whose objects are records for employee..pdf
define a class name Employee whose objects are records for employee. Derive this class from the
class person given in the listing 8.1. An employee record inherits an employee\'s name from the
class Person. In addition, an employee record contains an annual salary represented as a single
value of type double, a hire date that gives the year hired as a single value of type int, and an
identification number that is a value of type String. Give your class a reasonable complement of
constructors, accessor methods, and mutator methods, as well as an equals method. Write a
program to fully test your class definition
this is the test file
import java.util.*;
public class EmployeeTest
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
char repeat;
do // repeat if user says \'yes\'
{
// Test the nine constructors (uses writeOutput method)
Employee e1 = new Employee(); // default constructor
System.out.println(\"Using default constructor:\");
e1.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e2 = new Employee(\"Mondo Kane\");
System.out.println(\"Using constructor with just name:\");
e2.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e3 = new Employee(\"Fleetis Pascal\", 111111.11);
System.out.println(\"Constructor with name & salary :\");
e3.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e4 = new Employee(\"Carl Wolf\", 1968);
System.out.println(\"Constructor with name and hire date:\");
e4.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e5 = new Employee(\"Sharon Kelly\", \"123-45-6789\");
System.out.println(\"Constructor with name and ssn:\");
e5.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e6 = new Employee(\"Joann Rousch\", 333333.33, 1963);
System.out.println(\"Constructor with name, salary & hire date:\");
e6.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e7 = new Employee(\"Lucy Sharp\", 444444.44, \"987-65-4321\");
System.out.println(\"Constructor with name, salary & ssn:\");
e7.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e8 = new Employee(\"Pierre Sokolskis\", 1964, \"999-99-9999\");
System.out.println(\"Constructor with name, hire date & ssn:\");
e8.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e9 = new Employee(\"Last One\", 555.55, 1999,
\"888-88-8888\");
System.out.println(\"Constructor with name, salary, hire date, and ssn:\");
e9.writeOutput();
System.out.println();
System.out.println(\"===============================\");
// Test methods to change, return and write values
// change all
System.out.println(\"Before:\");
e9.writeOutput();
System.out.println();
Sy.
Java questionI am having issues returning the score sort in numeri.pdf
Java question
I am having issues returning the score sort in numerical order for more than 2 entries. I had to
develop an enhancement which allowed the application to sort the list by score. The easiest
solution is probably to create a second student class (perhaps called StudentScore) that
implements the IComparable interface to sort by score rather than by name
StudentSortApp
import java.util.*;
public class StudentSortApp
{
public static void main(String[] args)
{
System.out.println(\"Welcome to the Student Scores Application.\"+\"\ \");
Scanner sc = new Scanner(System.in);
System.out.print(\"Enter number of students to enter: \");
int numberofStudents = sc.nextInt();
//arrays storing student name and score
Student[] students = new Student[numberofStudents];
StudentScore [] studentScores = new StudentScore [numberofStudents];
int t = 0;
for (int i = 0; i < numberofStudents; i++)
{
System.out.println(\"\");
String studentLastName = Validator.lastName(sc, \"Student \" + (i+1) + \" Last name: \");
String studentFirstName = Validator.lastName(sc, \"Student \" + (i+1) + \" First name: \");
int studentScore = Validator.validScore(sc, \"Student \" + (i+1) + \" score : \");
students [t] = new Student(studentFirstName, studentLastName , studentScore);
studentScores [t] = new StudentScore(studentFirstName, studentLastName , studentScore);
t = t + 1;
}
//output
System.out.println(\"\");
System.out.println(\"Last Name Sort\");
Arrays.sort(students, 0, numberofStudents);
for(Student i: students)
System.out.println(i.getlastName()+\", \"+i.getfirstName()+\": \"+i.getScore());
System.out.println();
System.out.println(\"Score Sort\");
Arrays.sort(studentScores, 0, numberofStudents);
for(StudentScore i: studentScores)
System.out.println(i.getlastName()+\", \"+i.getfirstName()+\": \"+i.getScore());
}
}
Validator Class
import java.util.Scanner;
public class Validator
{
public static int validScore(Scanner sc, String prompt)
{
int studentScore = 0;
boolean isValid = false;
while (isValid == false)
{
System.out.print (prompt);
studentScore = sc.nextInt();
if (studentScore > 100 || studentScore < 0)
{
System.out.println(\"Error! You have to enter a score between 0 and 100\");
}
else
{
isValid = true;
}
}
return studentScore;
}
public static String lastName(Scanner sc, String prompt)
{
Scanner input = new Scanner(System.in);
String StudentName = \"\";
boolean isvalid = false;
while (isvalid == false)
{
System.out.print (prompt);
StudentName = input.nextLine();
if (StudentName == null || StudentName.equals(\"\"))
{
System.out.println(\"Error! You have to enter a name.\");
}
else
{
isvalid = true;
}
}
return StudentName;
}
}
Student Class
public class Student implements Comparable
{
private String firstName = \"\";
private String lastName = \"\";
private int score = 0;
// Student Class constructor
public Student(String firstName, String lastName, int score)
{
this.firstName = firstName;
this.lastName = lastName;
this.score = score;
}
@Override
public int compareTo.
There is something wrong with my program-- (once I do a for view all t.pdf
There is something wrong with my program.. (once I do a for view all this is the outcome in the
console...(carnea:Name: carnea, Address: 30 repeated..) why is this?
import java.util.Scanner;
public class AddressBook {
public static void main(String[] args) {
Tablea addressBook = new Tablea();
Scanner scanner = new Scanner(System.in);
String name, address;
String action = null;
boolean moreEntries = true;
while (moreEntries) {
System.out.println("/nMenu");
System.out.println("n.Add Entry");
System.out.println("d. Delete Entry");
System.out.println("u. Update Entry");
System.out.println("l. Search");
System.out.println("a. View All");
System.out.println("q. Exit");
action = scanner.nextLine();
// Insert a new entry into the address book
switch (action) {
case "n":
System.out.print("Enter a name: ");
name = scanner.nextLine();
System.out.print("Enter an address: ");
address = scanner.nextLine();
addressBook.insert(name, address);
System.out.println("New Contact has been added,");
break;
// Delete an entry from the address book
case "d":
System.out.println("Enter a name to delete: ");
name = scanner.nextLine();
boolean deleted = addressBook.delete(name);
if (deleted) {
System.out.println("Address deleted");
} else {
System.out.println("Name not found");
}
break;
// Update an entry in the address book
case "u":
System.out.print("Enter a name to update: ");
name = scanner.nextLine();
System.out.print("Enter a new address: ");
address = scanner.nextLine();
boolean updated = addressBook.update(name, address);
if (updated) {
System.out.println("Address updated");
} else {
System.out.println("Name not found");
}
break;
// Lookup an entry in the address book
case "l":
System.out.print("Enter a name to look up: ");
name = scanner.nextLine();
String result = addressBook.lookUp(name);
if (result != null) {
System.out.println("Address: " + result);
} else {
System.out.println("Name not found");
}
break;
// Display all entries in the address book
case "a":
System.out.println("All entries:");
addressBook.displayAll();
break;
// Quit the program
case"q":
System.out.println("Quitting...");
}
}
}
}
public class Node {
private String name;
private String address;
private Node next;
public Node(String name, String address) {
// add here ..
this.name = name;
this.address = address;
}
public String getName() {
// add here ..
return this.name;
}
public void setName(String name) {
// add here ..
this.name = name;
}
public String getAddress() {
// add here ..
return this.address;
}
public void setAddress(String address) {
// add here ..
this.address = address;
}
public Node getNext() {
// add here ..
return this.next;
}
public String toString() {
return "Name: "+ name +", Address:" +address;
}
public void setNext(Node node) {
// add here ..
this.next = next;
}
public void setAddress (Object newValue) {
this.address = address;
}
public void setName(Object newValue) {
this.name = name;
}
}
import java.util.Scanner;
public class Tablea {
private Node mark;
public Node get.
How to fix this error- Exception in thread -main- q- Exit java-lang-.pdf
How to fix this error:
Exception in thread "main" q. Exit
java.lang.NullPointerException: Cannot invoke "String.hashCode()" because "action" is null
at AddressBook.main(AddressBook.java:23)
import java.util.Scanner;
public class AddressBook {
public static void main(String[] args) {
Tablea addressBook = new Tablea();
Scanner scanner = new Scanner(System.in);
String name, address;
String action = null;
boolean moreEntries = true;
while (moreEntries) {
System.out.println("/nMenu");
System.out.println("n.Add Entry");
System.out.println("d. Delete Entry");
System.out.println("u. Update Entry");
System.out.println("l. Search");
System.out.println("a. View All");
System.out.println("q. Exit");
// Insert a new entry into the address book
switch (action) {
case "n":
System.out.print("Enter a name: ");
name = scanner.nextLine();
System.out.print("Enter an address: ");
address = scanner.nextLine();
addressBook.insert(name, address);
System.out.println("New Contact has been added,");
System.out.print("Add another entry? (y/n): ");
String answer = scanner.nextLine().toLowerCase();
moreEntries = answer.equals("y") || answer.equals("yes");
break;
// Delete an entry from the address book
case "d":
System.out.println("Enter a name to delete: ");
name = scanner.nextLine();
boolean deleted = addressBook.delete(name);
if (deleted) {
System.out.println("Address deleted");
} else {
System.out.println("Name not found");
}
break;
// Update an entry in the address book
case "u":
System.out.print("Enter a name to update: ");
name = scanner.nextLine();
System.out.print("Enter a new address: ");
address = scanner.nextLine();
boolean updated = addressBook.update(name, address);
if (updated) {
System.out.println("Address updated");
} else {
System.out.println("Name not found");
}
break;
// Lookup an entry in the address book
case "l":
System.out.print("Enter a name to look up: ");
name = scanner.nextLine();
String result = addressBook.lookUp(name);
if (result != null) {
System.out.println("Address: " + result);
} else {
System.out.println("Name not found");
}
break;
// Display all entries in the address book
case "a":
System.out.println("All entries:");
addressBook.displayAll();
break;
// Quit the program
case"q":
System.out.println("Quitting...");
}
}
}
}
OTHER FILES THAT GO WITH THIS
public class Node {
private String name;
private String address;
private Node next;
Node() {
// add here ..
}
Node(String name, String address) {
// add here ..
this.name = name;
this.address = address;
this.next = null;
}
public String getKey() {
// add here ..
return this.name;
}
public void setKey(String name) {
// add here ..
this.name = name;
}
public String getValue() {
// add here ..
return this.address;
}
public void setValue(String address) {
// add here ..
this.address = address;
}
public Node getNext() {
// add here ..
return this.next;
}
public void setNext(Node next) {
// add here ..
this.next = next;
}
}
import java.util.Scanner;
public class Tablea {
private Node mark;
publi.
ublic class Elevator { private static final String DOWN = down.pdf
ublic class Elevator { private static final String DOWN = \"down\"; private static final
String UP = \"up\"; private final Random rand = new Random(); private int floor =
rand.nextInt(10) + 1; public void simulateElevator() { System.out.println(\"The elevator
is now on floor \" + floor); System.out.print(\"Which floor are you at now (0-10) where 0 =
basement: \"); int destinationFloor = readDestinationFloor(); int movement =
getMovementDirection(destinationFloor); if (movement == 0) {
System.out.println(\"Enter the elevator\"); } else { moveElevator(destinationFloor,
movement); } } private int readDestinationFloor() { return Keyboard.readInt();
} /* determine if movement needed is to up or to down */ private int
getMovementDirection(int destinationFloor) { int dif = destinationFloor - floor; if (dif
== 0) { return 0; } return dif / Math.abs(dif); } private String
getMovementName(int movement) { return movement < 0 ? DOWN : UP; } private
void moveElevator(int destination, int moveDirection) { String movementName =
getMovementName(moveDirection); System.out.println(\"The elevator is on it\'s way
\".concat(movementName).concat(\"...\")); while (floor != destination) { floor +=
moveDirection; System.out.println(floor); } System.out.println(\"The elevator
has arrived\"); } public static void main(String[] args) { new
Elevator().simulateElevator(); } }
Solution
ublic class Elevator { private static final String DOWN = \"down\"; private static final
String UP = \"up\"; private final Random rand = new Random(); private int floor =
rand.nextInt(10) + 1; public void simulateElevator() { System.out.println(\"The elevator
is now on floor \" + floor); System.out.print(\"Which floor are you at now (0-10) where 0 =
basement: \"); int destinationFloor = readDestinationFloor(); int movement =
getMovementDirection(destinationFloor); if (movement == 0) {
System.out.println(\"Enter the elevator\"); } else { moveElevator(destinationFloor,
movement); } } private int readDestinationFloor() { return Keyboard.readInt();
} /* determine if movement needed is to up or to down */ private int
getMovementDirection(int destinationFloor) { int dif = destinationFloor - floor; if (dif
== 0) { return 0; } return dif / Math.abs(dif); } private String
getMovementName(int movement) { return movement < 0 ? DOWN : UP; } private
void moveElevator(int destination, int moveDirection) { String movementName =
getMovementName(moveDirection); System.out.println(\"The elevator is on it\'s way
\".concat(movementName).concat(\"...\")); while (floor != destination) { floor +=
moveDirection; System.out.println(floor); } System.out.println(\"The elevator
has arrived\"); } public static void main(String[] args) { new
Elevator().simulateElevator(); } }.
More Related Content
Similar to Listing.javaimport java.util.Scanner;public class Listing { .pdf
Code to copy Person.java .pdf
Code to copy:
/******************** Person.java **********************/
// Create a class Person
publicclass Person
{
// Declare variables
private String name;
private MyDate birthdate; // This is a date based on a Person\'s birthday
// Create accessor method for the name
public String getName()
{
return name;
}
// Create mutator method for name
publicvoid setName(String name)
{
this.name = name;
}
// Create accessor method for the name
public MyDate getBirthdate()
{
return birthdate;
}
// Create mutator method for name
publicvoid setBirthdate(MyDate birthdate)
{
this.birthdate = birthdate;
}
// Create a parameter constructor
public Person(String name, int pp, int kk, int vv)
{
this(name, new MyDate(pp, kk, vv));
}
// Create a parameter constructor
public Person(String name, MyDate birthday)
{
this(name);
this.birthdate = birthday;
}
// Create a parameter constructor
public Person(String name) {
this.name = name;
}
// Create to string method to display person data
@Override
public String toString() {
return \"Person [name=\" + name + \", birthdate=\" + birthdate + \"]\";
}
}
/******************** MyDate.java **********************/
// Create a class named MyDate
class MyDate
{
// Declare variables
privateint day;
privateint month;
privateint year;
// Create a default constructor
public MyDate(int month, int day, int year)
{
this.day = day;
this.month = month;
this.year = year;
}
// Create a compareTo method to compare the date objects
int compareTo(MyDate obj)
{
if(obj.day==this.day && obj.month==this.month && obj.year==this.year)
{
return 0;
}
elseif(obj.year>this.year)
{
return 1;
}
elseif(obj.year > this.year && obj.month > this.month)
{
return 1;
}
elseif(obj.year > this.year && obj.month > this.month && obj.day==this.day)
{
return 1;
}
else
return -1;
}
// Create a toString() method to display the date
@Override
public String toString()
{
return \"MyDate [day=\" + day + \", month=\" + month + \", year=\" + year + \"]\";
}
}
/******************** PersonSort.java **********************/
// import statements
import java.util.*;
import java.io.*;
// Create a class PersonSort
publicclass PersonSort implements Comparator
{
// Create compare method to compare two objects
@Override
publicint compare(Person o1, Person o2)
{
return 0;
}
// Create a main method to test the program
publicstaticvoid main(String [] args)
{
// Declare variables
String line;
String fileName=\"dataFile.txt\";
String data=\"\";
// Create a array list for the person class
ArrayList person= new ArrayList();
// Create a try block to handle the run time exceptions
try
{
// Create an object for the FileReader class
FileReader fileReader = new FileReader(fileName);
BufferedReader bufferedReader = new BufferedReader(fileReader);
// Create a for loop to read the data in the file dataFile.txt
while ((line = bufferedReader.readLine()) != null)
{
data+=line;
}
}
// Create a catch block to catch run time exceptions.
catch (FileNotFoundException ex)
{
System.out.println(\"Unable to op.
BasicPizza.javapublic class BasicPizza { Declaring instance .pdf
BasicPizza.java
public class BasicPizza {
//Declaring instance variables
String type;
String crust;
String ingredients;
double cost;
//Default Constructor
public BasicPizza() {
super();
}
//Parameterized constructor
public BasicPizza(String type) {
super();
this.type = type;
}
//Setters and Getters
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getCrust() {
return crust;
}
public void setCrust(String crust) {
this.crust = crust;
}
public String getIngredients() {
return ingredients;
}
public void setIngredients(String ingredients) {
this.ingredients = ingredients;
}
public double getCost() {
return cost;
}
public void setCost() {
this.cost = 5;
}
//toString() method is used to display the contents of the Object.inside it.
@Override
public String toString() {
return \"BasicPizza [type=\" + type + \", crust=\" + crust + \", ingredients=\"
+ ingredients + \", cost=\" + cost + \"]\";
}
}
________________________________________________________________
LiFiCheese.java
public class LiFiCheese extends BasicPizza{
//Declaring instance variables
private String crust;
private double cost;
private String ingredients;
//Default constructor
public LiFiCheese() {
super(\"Cheese\");
this.cost=5;
}
//Setters and getters
public void setCrust()
{
this.crust=\"thin\";
}
public String getCrust()
{
return crust;
}
public double getCost() {
return cost;
}
public void setCost(double cost) {
}
public String getIngredients() {
return ingredients;
}
public void setIngredients(String ingredients) {
this.ingredients = ingredients;
}
//toString() method is used to display the contents of the Object.inside it.
@Override
public String toString() {
System.out.println(\"You Ordered :\");
System.out.println(getType());
setCrust();
System.out.println(getCrust());
System.out.println(\"Total Cost of :\"+getCost());
return \"\";
}
}
__________________________________________________________________________
LiFiPizza.java
import java.util.Scanner;
public class LiFiPizza extends BasicPizza {
//Declaring instance variables
private String type;
private double cost;
private String crust;
private String ingredients;
//Default constructor
public LiFiPizza()
{
super();
this.type = \"Meat\";
this.cost=5;
}
//Setters and getters
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public double getCost() {
return cost;
}
public void setCost() {
this.cost = this.cost+2;
}
public String getCrust() {
return crust;
}
public void setCrust(String crust) {
if(crust.equals(\"Thin\"))
{
this.crust=\"Thin\";
}
else if(crust.equals(\"Thick\"))
{
this.crust=\"Thick\";
}
}
public String getIngredients() {
return ingredients;
}
public void setIngredients(String ingredients) {
this.ingredients = ingredients;
}
//toString() method is used to display the contents of the Object.inside it.
@Override
public String toString() {
System.out.println(\"You Ordered :\");
System.out.println(getType());
System.ou.
assignmentTwoCar.javaassignmentTwoCar.javapackage assignmentTw.docx
assignmentTwo/Car.javaassignmentTwo/Car.javapackage assignmentTwo;
// incomplete starter code for assignment two programming 1, sem 2 2014
// author: Kathleen Keogh version 1, incomplete. September 2014
publicclassCarextendsVehicle{
// instance variables
privateint numSeats, numDoors;
privateboolean hatch, tintedWindows;
publicCar(){
}
publicCar(int _numSeats,int _numDoors,boolean _hatch,boolean _tintedWindows){
// insert appropriate initialisation code here based on the parameters provided
}
// get and set methods for each car instance variable
publicint getNumSeats(){
return numSeats;
}
publicboolean setNumSeats(int _numSeats){
returntrue;// change this based on validation
}
publicint getNumDoors(){
return1;// change this to return appropriate value
}
publicvoid setNumDoors(){
}
publicboolean getHatch(){
returntrue;// change this to return the appropriate value
}
publicvoid setHatch(boolean _hatch){
}
publicboolean getTintedWindows(){
returntrue;// update this to return the appropriate value
}
publicvoid setTintedWindows(boolean _tintedWindows){
}
// toString method
publicString toString(){
// insert code here to appropriately return a string of data for this car, use superclass methods where appropriate
return("Car. Make "+ getMake());// change this to return more than just the make
}
}
assignmentTwo/Garage.javaassignmentTwo/Garage.javapackage assignmentTwo;
// Author, Version 1. Starter Code: Kathleen Keogh September 2014
// Author, Version 2. :
// Garage class is for a garage that contains a number of vehicles
publicclassGarage{
//instance variables
Vehicle vehicleList[];
int maxVehicles=10;// default maximum number of vehicles is 10
int currsize;
publicGarage(){// constructor with no parameters
vehicleList =newVehicle[maxVehicles];
currsize=0;
}
publicGarage(int _numMaxVehicles){// constructor with one parameter - maximum number of vehicles for garage
maxVehicles = _numMaxVehicles;
vehicleList =newVehicle[maxVehicles];
currsize =0;
}
// TODO: add get and set methods
// TODO: add toString() method
// TODO: add other methods including addVehicle, sortVehicles
}
assignmentTwo/Rectangle.javaassignmentTwo/Rectangle.javapackage assignmentTwo;
publicclassRectangleextendsShapes{
double length, width;// extra instance variables associated with Rectangle particularly
publicRectangle(){// constructor to create an 'empty' triangle
super("","",0,0);
length =0.0;//initialise length and width to zero for new rectangle
width =0.0;
}
publicRectangle(double initLength,double initWidth,String initName,String initColour,double xCoord,double yCoord){
super(initName, initColour, xCoord, yCoord);// use constructor from super class: Shapes
setLength(initLength);// initialise length to provided value
setWidth(initWidth);
}
publicboolean setLength(double _length){// mutator method to set length to new value
if(_length >0.0){// validate length is positi ...
Repeat Programming Project 2 in Chapter 5. This time, add the follow.pdf
Repeat Programming Project 2 in Chapter 5. This time, add the following four constructor
methods: one for each instance variable, one with two parameters for the two instance variables,
and a default constructor. Be sure that each constructor sets all the instance variables. write a
driver program to test each of the methods, including each of the four constructors and at least
one true or false case for each of the test method.
this is the code that i have to add four constructor methods to
import java.util.*;
public class PersonImproved// Counter is the name of the class and i saved it in a file named
PersonImproved.
{
//Data members
private String name;
private int age;
public void readInput()
{
Scanner keyboard = new Scanner(System.in);
System.out.println(\"What is the person\'s name?\");// This gets the program ready for
keyboard input by telling us that there is a new scanner called keyboard, that is accepting user
input.
name = keyboard.nextLine();
System.out.println(\"What is the person\'s age?\");
age = keyboard.nextInt();
while (age < 0)
{
System.out.println(\"Age cannot be negative.\");
System.out.println(\"Reenter age:\");
age = keyboard.nextInt();
}
}
public void writeOutput()
{
System.out.println(\"Name = \" + name);
System.out.println(\"Age = \" + age);
}
//method to set non negative age
public void set(String newName, int newAge)
{
name = newName;
if (newAge >= 0)
age = newAge;
else
{
System.out.println(\"ERROR: Used a negative age.\");
System.exit(0);
}
}
//method to setting name
public void setName(String newName)
{
name = newName;
}
//method to set age
public void setAge(int newAge)
{
if (newAge >= 0)
age = newAge;
else
{
System.out.println(\"ERROR: Used a negative age.\");
System.exit(0);
}
} //to get name
public String getName()
{
return name;
}
public int getAge()
{
return age;
}
/*Boolean tests for if two persons are equal (same name and age), if two persons
have the same name, if two persons have the same age, if one person is older
than another, and if one person is younger than another.*/
public boolean equals(PersonImproved another)
{
return(this.name.equalsIgnoreCase(another.name)
&& this.getAge() == another.getAge());
}
public boolean isSameName(PersonImproved another)
{
return(this.name.equalsIgnoreCase(another.name));
}
public boolean isSameAge(PersonImproved another)
{
return(this.getAge() == another.getAge());
}
public boolean isOlderThan(PersonImproved another)
{
return(this.getAge() > another.getAge());
}
public boolean isYoungerThan(PersonImproved
another)
{
return(this.getAge() < another.getAge());
}
}
and this is the test file
public class PersonCh6Test
{
public static void main(String[] args)
{
System.out.println();
System.out.println(\"Test case 1: default constructor and\");
System.out.println(\"writeOutput() method.\");
System.out.println();
PersonCh6 secretAgent1 = new PersonCh6();
System.out.println(\"Results of default constructor:\");
System.out.println(\"Should be name = \\\"No name\\\" and\");
S.
So Far I have these two classes but I need help with my persontest c.pdf
So Far I have these two classes but I need help with my persontest class:
The next step is to add method calls for the accessor methods after each input:
//Reading and updating values
System.out.print(\"\ Enter Person Name: \");
person1.setPersonName(sc.nextLine());
System.out.println(\"You entered: \" + person1.getPersonName());
Call the accessor function each time you ask for input, after capturing that input. Then repeat for
a second Person, only this time call the constructor that takes the student id as a parameter.
7 import java.util.Scanner;
8
9 class PersonTest
10 {
11 //Main method
12 public static void main(String args[])
13 {
14 Scanner sc = new Scanner(System.in);
15
16 //Creating object
17 Persons_Information person1 = new Persons_Information();
18
19 //Reading and updating values
20 System.out.print(\"\ Enter Person Name: \");
21 person1.setPersonName(sc.nextLine());
22
23 System.out.print(\"\ Enter Current Address: \");
24 person1.setCurrentAdress(sc.nextLine());
25
26 System.out.print(\"\ Enter Permanent Address: \");
27 person1.setpermanentAdress(sc.nextLine());
28
29 System.out.print(\"\ Enter ID number: \");
30 person1.setIdNumber(sc.nextInt());
31
32 sc.nextLine();
33
34 System.out.print(\"\ Enter Birth Date: \");
35 person1.setBirthDate(sc.nextLine());
36
37
38 System.out.print(\"\ Enter Person Age: \");
39 person1.setPersonAge(sc.nextInt());
40
41
42 System.out.print(\"\ Enter Entry Year: \");
43 person1.setEntryYear(sc.nextInt());
44
45
46 System.out.print(\"\ Enter Total Years: \");
47 person1.setTotalYears(sc.nextInt());
48
49 //Printing person 1 details
50 System.out.println(\"\ Person 1: \ \" + person1.toString());
51 }
52 }
Solution
Persons_Information.java
public class Persons_Information {
//Declaring instance variables
private String personName;
private String currentAdress;
private String permanentAdress;
private int idNumber;
private String birthDate;
private int personAge;
private int entryYear;
private int totalYears;
//Zero argumented constructor
public Persons_Information()
{
}
//Parameterized constructor
public Persons_Information(int idNumber) {
this.idNumber = idNumber;
}
//Getters and setters
public String getPersonName() {
return personName;
}
public void setPersonName(String personName) {
this.personName = personName;
}
public String getCurrentAdress() {
return currentAdress;
}
public void setCurrentAdress(String currentAdress) {
this.currentAdress = currentAdress;
}
public String getPermanentAdress() {
return permanentAdress;
}
public void setPermanentAdress(String permanentAdress) {
this.permanentAdress = permanentAdress;
}
public int getIdNumber() {
return idNumber;
}
public void setIdNumber(int idNumber) {
this.idNumber = idNumber;
}
public String getBirthDate() {
return birthDate;
}
public void setBirthDate(String birthDate) {
this.birthDate = birthDate;
}
public int getPersonAge() {
return personAge;
}
public void setPersonAge(int personAge) {
this.personAge = personAge;
}
public int getEntryYe.
Create a Code that will add an Add, Edi, and Delete button to the GU.pdf
Create a Code that will add an Add, Edi, and Delete button to the GUI like bellow.
public class Student {
private String studentID;
private String studentEmail;
private String studentFirstName;
private String studentLastName;
/**
* @param studentID
* @param studentEmail
* @param studentFirstName
* @param studentLastName
*/
public Student(String studentID, String studentEmail, String studentFirstName,
String studentLastName) {
this.studentID = studentID;
this.studentEmail = studentEmail;
this.studentFirstName = studentFirstName;
this.studentLastName = studentLastName;
}
/**
* @return the studentID
*/
public String getStudentID() {
return studentID;
}
/**
* @param studentID
* the studentID to set
*/
public void setStudentID(String studentID) {
this.studentID = studentID;
}
/**
* @return the studentEmail
*/
public String getStudentEmail() {
return studentEmail;
}
/**
* @param studentEmail
* the studentEmail to set
*/
public void setStudentEmail(String studentEmail) {
this.studentEmail = studentEmail;
}
/**
* @return the studentFirstName
*/
public String getStudentFirstName() {
return studentFirstName;
}
/**
* @param studentFirstName
* the studentFirstName to set
*/
public void setStudentFirstName(String studentFirstName) {
this.studentFirstName = studentFirstName;
}
/**
* @return the studentLastName
*/
public String getStudentLastName() {
return studentLastName;
}
/**
* @param studentLastName
* the studentLastName to set
*/
public void setStudentLastName(String studentLastName) {
this.studentLastName = studentLastName;
}
}
------------------------------------------------------------------------------------------------------
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
public class JTableExample extends JFrame {
public JTableExample() {
// headers for the table
String[] columns = new String[] { \"Email\", \"First Name\", \"Last Name\" };
Student[] students = {
new Student(\"S123\", \"sri3(AT).com\", \"Srinu\", \"Vasu\"),
new Student(\"S124\", \"sri4(AT).com\", \"Rajesh\", \"Kumar\"),
new Student(\"S125\", \"sri5(AT).com\", \"Kumar\", \"Suresh\"),
new Student(\"S126\", \"sri6(AT).com\", \"Balaji\", \"kumar\") };
// actual data for the table in a 2d array
Object[][] data = new Object[students.length][3];
for (int i = 0; i < data.length; i++) {
data[i][0] = students[i].getStudentEmail();
data[i][1] = students[i].getStudentFirstName();
data[i][2] = students[i].getStudentLastName();
}
// create table with data
JTable table = new JTable(data, columns);
// add the table to the frame
this.add(new JScrollPane(table));
this.setTitle(\"Student Manager\");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.pack();
this.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new JTableExample();
}
});
}
} Student Manager Email sri3@gmail.com sri4@gmail.com sri5@gmail.com sri6@gmail com
Last Name Firs.
Kotlin Data Model
2017/10/26 Android Taipei 分享
透過 Data Model 的演進，了解 Kotlin 的優點，並開始導入 Kotlin
現今 Data Model 的趨勢為以下三點:
1. 自動產生 (Code Generation)
2. Immutable Object
3. Null-safety
了解如何透過 Kotlin Data Classes 達到以上三點要求
Demo Project
https://github.com/ch8908/KotlinDataClass
java question Fill the add statement areaProject is to wo.pdf
java question: \"Fill the add statement area\"
Project is to work with stacks.
package p2;
public class Coordinate {
public int x;
public int y;
public Coordinate( int x, int y ) {
this.x = x;
this.y = y;
}
public String toString() {
return \"(\" + this.x + \",\" + this.y + \")\";
}
@Override
public boolean equals( Object object ) {
if( object == null ) {
return false;
}
if( ! Coordinate.class.isAssignableFrom( object.getClass() )) {
return false;
}
final Coordinate other = (Coordinate) object;
return this.x == other.x && this.y == other.y;
}
}
package p2;
public class Coordinate {
public int x;
public int y;
public Coordinate( int x, int y ) {
this.x = x;
this.y = y;
}
public String toString() {
return \"(\" + this.x + \",\" + this.y + \")\";
}
@Override
public boolean equals( Object object ) {
if( object == null ) {
return false;
}
if( ! Coordinate.class.isAssignableFrom( object.getClass() )) {
return false;
}
final Coordinate other = (Coordinate) object;
return this.x == other.x && this.y == other.y;
}
}
package p2;
import java.util.Vector;
public class Maze {
private char[][] maze;
private int height;
private int width;
/**
* Create a new Maze of the specified height and width, initializing every
* location as empty, with a \' \'.
**/
public Maze( int width, int height ) {
// ADD STATEMENTS HERE
}
/**
* Mutator to allow us to set the specified Coordinate as blocked,
* marking it with a \'X\'
**/
public void setBlocked( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Mutator to allow us to set the specified Coordinate as having been visited,
* marking it with a \'*\'
**/
public void setVisited( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Mutator to allow us to set the specified Coordinate as part of the path solution,
* marking it with a \'.\'
**/
public void setPath( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Returns the character at the locatio specified by the Coordinate
**/
public char at( Coordinate coord ) {
// ADD STATEMENTS HERE
}
/**
* Returns a Coordinate array containing all Coordinates that are clear around
* the specified coordinate.
**/
public Coordinate[] clearAround( Coordinate coord ) {
Vector vector = new Vector();
// ADD STATEMENTS HERE
// Look at each of the locations around the specified Coordinate, and add it
// to the vector if it is clear (i.e. a space)
return vector.toArray( new Coordinate[0] );
}
/**
* Returns a Coordinate that provides the entrance location in this maze.
**/
public Coordinate start() {
return new Coordinate( 0, 1 );
}
/**
* Returns a Coordinate that provides the exit location from this maze.
**/
public Coordinate end() {
// ADD STATEMENTS HERE
}
/**
* The toString() method is responsible for creating a String representation
* of the Maze. See the project specification for sample output. Note that
* the String representation adds numbers across the top and side of the Maze
* to show the Coordinates of each cell in the maze.
**/
public String toString() {
StringBuilder buffer =.
operating system linux,ubuntu,Mac Geometri.pdf
//operating system linux,ubuntu,Mac
/*********************GeometricObject.java**********************/
public abstract class GeometricObject {
private String color = \"white\";
private boolean filled;
// default constructure
public GeometricObject() {
super();
// TODO Auto-generated constructor stub
}
// construct a Geometric Object
// parameterized constructure
public GeometricObject(String color, boolean filled) {
this.color = color;
this.filled = filled;
}
/** Getter method for color */
public String getColor() {
return color;
}
/** Setter method for color */
public void setColor(String color) {
this.color = color;
}
/**
* Getter method for filled. Since filled is boolean, so the gret method
* name is isFilled
*/
public boolean isFilled() {
return filled;
}
/** Setter method for filled */
public void setFilled(boolean filled) {
this.filled = filled;
}
/** Abstract method for FindArea */
public abstract double findArea();
/** Abstract method for findPerimeter */
public abstract double findPerimeter();
}
/*****************************Octagon.java**************/
public class Octagon extends GeometricObject implements Cloneable, Comparable {
private double side;
/** construct a Octagon with specified side */
public Octagon(double side) {
super();
this.side = side;
}
/** Implement the abstract method findArea in GeometricObject */
@Override
public double findArea() {
double area = (2 + 4 / Math.sqrt(2)) * side * side;
return area;
}
/** Implement the abstract method findArea in findPerimeter */
@Override
public double findPerimeter() {
double perimeter = 8 * side;
return perimeter;
}
/** Implement the compareTo method in Comparable interface */
@Override
public int compareTo(Object o) {
// TODO Auto-generated method stub
return 0;
}
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
/*******************App.java*******************/
public class App {
public static void main(String[] args) {
Octagon a1 = new Octagon(5);//creating object of octagon
System.out.println(\"Area of a1 is \" + a1.findArea());
System.out.println(\"Perimeter of a1 is \" + a1.findPerimeter());
Object a2;
try {
a2 = a1.clone();
String result = (a1.compareTo(a2) == 0) ? \"a1 and its clone a2 have the same area\"
: \"a1 and its clone a2 have different areas\";
System.out.println(\"Compare a1 and its clone a2:\ \\t \" + result);
System.out.println(\"Hashcode of a1: \" + a1.hashCode());
System.out.println(\"Hashcode of a2: \" + a2.hashCode());
System.out.println(\"Displaying a1: \" + a1);
System.out.println(\"Displaying a2: \" + a2);
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
}
}
/*****************output***************/
gopal@gopal:~/Desktop/chegg$ javac GeometricObject.java
gopal@gopal:~/Desktop/chegg$ javac Octagon.java
gopal@gopal:~/Desktop/chegg$ javac App.java
gopal@gopal:~/Desktop/chegg$ java App
Area of a1 is 120.71067811865476
Perimeter of a1 is 40.0
Compare a1 and its clone a2:
a1 and its clone a2 have the same area
.
when I compile to get the survey title the overload constructor asks.docx
when I compile to get the survey title the overload constructor asks for title name input else the default constructor sets a default name. My code ask for the title and after I enter it hangs until I enter it again
import java.util.Scanner;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
//package surveyproject;
public class Survey {
//declare variables
private static int respondentID;
public String surveyTitle;
public int initial_menu_Choice;
public int[][] ansArray = new int [3][3];
public String[] questArray = new String [3];
Scanner scan = new Scanner(System.in);
//default constructor
public Survey(){
surveyTitle = "Customer Survey";
}
//constructor with parameter
public Survey(String title){
respondentID = 0;
surveyTitle = title;
}
//method to get survey title
public String getSurveyTitle(){
return surveyTitle;
}
//method to get respondent ID
public int getRespondentID(){
return respondentID;
}
//method to generate respondent ID
public int generateRespondentID(){
//increments the respondent ID
respondentID++;
return respondentID;
}
public void setIntialMenuChoice(int inti_menu_choice){
initial_menu_Choice = inti_menu_choice;
}
//display survey results
public void displaySurveyResults(){
//print name of survey
//print ansArray
System.out.println("Survey: "+ surveyTitle);
System.out.println("Results of the survey: ");
System.out.print("Respondent ID| Q1\tQ2\tQ3 \n");
for(int i = 0; i < 3; i++){
System.out.print(" " + i + " | ");
for(int j = 0; j < 3; j++){
System.out.print(ansArray[i][j]+"\t");
}
System.out.println("\n");
}
}
public void displayQuestionStats(int questNum){
//display response entered for 'questNum'
System.out.println("Question stats for Question: "+questNum+" "+questArray[questNum-1]);
for(int i = 0; i < 3; i++){
System.out.println(ansArray[i][questNum-1]);
}
}
void enterQuestions(){
Scanner scan = new Scanner(System.in);
//user will enter 3 questions to be stored in string array
System.out.println("Enter 3 questions to create a survey");
for(int i = 0; i < 3; i++){
System.out.println("Enter question "+(i+1)+":");
questArray[i] = scan.next();
}
}
public void logResponse(int id, int questNum, int response){
//enter response in the matrix
ansArray[id][questNum] = response;
}
//user to fill in the survey questions
public void completeSurvey(int id){
System.out.println("Respondent "+ id+ " is taking survey");
Scanner inp = new Scanner(System.in);
int resp ;
System.out.println("Answer each question with number between 1 to 5");
for(int i=0; i<3; i++){
System.out.print("Question "+(i+1)+":");
//pres.
Overview You are tasked with writing a program called Social Security.pdf
Overview You are tasked with writing a program called Social Security that prompts the user to
enter the data (name and date-ofbirth)for a collection of people. The program will then process
this collection (array) of People (objects we create in another file) to determine who qualifies for
Social Security benefits. Specifications For our Social Security program we will need two java
files 1. Person java The person class which stores the data for a specific individual 2.
SocialSecurity.java (The driver) Details for these two class files appear below. Person ava UML
diagram name: String birthdate: LocalDate Person0 Person (newName: String, month: int, day:
int, year: int) NetName newName: String) void getName(): String set BirthDate month int, day:
int, year int) void get BirthDate 0 LocalDate toString(): String calculate Age(myBirth
LocalDate) int Person ava method description Two constructors 1. A Default constructor that
creates a Person whose name and birthdate are set to null. 2. A parameterized constructor that
accepts a String representation of the name, and three integers corresponding to the month, day,
and year in which the person was born. Setters and getters for the two instance variables. A
toString0 method that prints the person in the form dob
Solution
import java.time.LocalDate;
import java.time.Period;
import java.time.format.DateTimeFormatter;
import java.util.Scanner;
class Person {
String name;
LocalDate birthdate;
public Person() {
super();
}
public Person(String name, int month, int day, int year) {
super();
this.name = name;
this.birthdate = LocalDate.of(year, month, day);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public LocalDate getBirthdate() {
return birthdate;
}
public void setBirthdate(int month, int day, int year) {
this.birthdate = LocalDate.of(year, month, day);
}
@Override
public String toString() {
DateTimeFormatter formatter = DateTimeFormatter.ofPattern(\"MM/dd/yyyy\");
birthdate.format(formatter);
return \"Person [name=\" + name + \", birthdate=\" + birthdate + \"]\";
}
public int calculateAge() {
return Period.between(birthdate, LocalDate.now()).getYears();
}
public void qualifySSN() {
if(this.calculateAge()>66)
System.out.println(\"Qualifies for Social Security Benifits\");
else
System.out.println(\"Doesnot qualifies for Social Security Benefits\");
}
}
public class SocialSecurity {
public static void main(String[] args) {
if (args.length > 1)
System.out.println(\"Invalid number of command line arguments\");
int num = Integer.parseInt(args[0]);
Person[] p = new Person[num];
Scanner in = new Scanner(System.in).useDelimiter(\"\\\ \");
;
for (int i = 0; i < num; i++) {
System.out.println(\"enter persons name\");
String name = in.next();
System.out.println(\"enter date of birth in the format Month Day Year\");
String dob = in.next();
String[] temp = dob.split(\" \");
p[i] = new Person(name, Integer.parseInt(temp[0]), Integer.parseInt(temp[1]),
Integer.pa.
define a class name Employee whose objects are records for employee..pdf
define a class name Employee whose objects are records for employee. Derive this class from the
class person given in the listing 8.1. An employee record inherits an employee\'s name from the
class Person. In addition, an employee record contains an annual salary represented as a single
value of type double, a hire date that gives the year hired as a single value of type int, and an
identification number that is a value of type String. Give your class a reasonable complement of
constructors, accessor methods, and mutator methods, as well as an equals method. Write a
program to fully test your class definition
this is the test file
import java.util.*;
public class EmployeeTest
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
char repeat;
do // repeat if user says \'yes\'
{
// Test the nine constructors (uses writeOutput method)
Employee e1 = new Employee(); // default constructor
System.out.println(\"Using default constructor:\");
e1.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e2 = new Employee(\"Mondo Kane\");
System.out.println(\"Using constructor with just name:\");
e2.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e3 = new Employee(\"Fleetis Pascal\", 111111.11);
System.out.println(\"Constructor with name & salary :\");
e3.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e4 = new Employee(\"Carl Wolf\", 1968);
System.out.println(\"Constructor with name and hire date:\");
e4.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e5 = new Employee(\"Sharon Kelly\", \"123-45-6789\");
System.out.println(\"Constructor with name and ssn:\");
e5.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e6 = new Employee(\"Joann Rousch\", 333333.33, 1963);
System.out.println(\"Constructor with name, salary & hire date:\");
e6.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e7 = new Employee(\"Lucy Sharp\", 444444.44, \"987-65-4321\");
System.out.println(\"Constructor with name, salary & ssn:\");
e7.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e8 = new Employee(\"Pierre Sokolskis\", 1964, \"999-99-9999\");
System.out.println(\"Constructor with name, hire date & ssn:\");
e8.writeOutput();
System.out.println();
System.out.println(\"===============================\");
Employee e9 = new Employee(\"Last One\", 555.55, 1999,
\"888-88-8888\");
System.out.println(\"Constructor with name, salary, hire date, and ssn:\");
e9.writeOutput();
System.out.println();
System.out.println(\"===============================\");
// Test methods to change, return and write values
// change all
System.out.println(\"Before:\");
e9.writeOutput();
System.out.println();
Sy.
Java questionI am having issues returning the score sort in numeri.pdf
Java question
I am having issues returning the score sort in numerical order for more than 2 entries. I had to
develop an enhancement which allowed the application to sort the list by score. The easiest
solution is probably to create a second student class (perhaps called StudentScore) that
implements the IComparable interface to sort by score rather than by name
StudentSortApp
import java.util.*;
public class StudentSortApp
{
public static void main(String[] args)
{
System.out.println(\"Welcome to the Student Scores Application.\"+\"\ \");
Scanner sc = new Scanner(System.in);
System.out.print(\"Enter number of students to enter: \");
int numberofStudents = sc.nextInt();
//arrays storing student name and score
Student[] students = new Student[numberofStudents];
StudentScore [] studentScores = new StudentScore [numberofStudents];
int t = 0;
for (int i = 0; i < numberofStudents; i++)
{
System.out.println(\"\");
String studentLastName = Validator.lastName(sc, \"Student \" + (i+1) + \" Last name: \");
String studentFirstName = Validator.lastName(sc, \"Student \" + (i+1) + \" First name: \");
int studentScore = Validator.validScore(sc, \"Student \" + (i+1) + \" score : \");
students [t] = new Student(studentFirstName, studentLastName , studentScore);
studentScores [t] = new StudentScore(studentFirstName, studentLastName , studentScore);
t = t + 1;
}
//output
System.out.println(\"\");
System.out.println(\"Last Name Sort\");
Arrays.sort(students, 0, numberofStudents);
for(Student i: students)
System.out.println(i.getlastName()+\", \"+i.getfirstName()+\": \"+i.getScore());
System.out.println();
System.out.println(\"Score Sort\");
Arrays.sort(studentScores, 0, numberofStudents);
for(StudentScore i: studentScores)
System.out.println(i.getlastName()+\", \"+i.getfirstName()+\": \"+i.getScore());
}
}
Validator Class
import java.util.Scanner;
public class Validator
{
public static int validScore(Scanner sc, String prompt)
{
int studentScore = 0;
boolean isValid = false;
while (isValid == false)
{
System.out.print (prompt);
studentScore = sc.nextInt();
if (studentScore > 100 || studentScore < 0)
{
System.out.println(\"Error! You have to enter a score between 0 and 100\");
}
else
{
isValid = true;
}
}
return studentScore;
}
public static String lastName(Scanner sc, String prompt)
{
Scanner input = new Scanner(System.in);
String StudentName = \"\";
boolean isvalid = false;
while (isvalid == false)
{
System.out.print (prompt);
StudentName = input.nextLine();
if (StudentName == null || StudentName.equals(\"\"))
{
System.out.println(\"Error! You have to enter a name.\");
}
else
{
isvalid = true;
}
}
return StudentName;
}
}
Student Class
public class Student implements Comparable
{
private String firstName = \"\";
private String lastName = \"\";
private int score = 0;
// Student Class constructor
public Student(String firstName, String lastName, int score)
{
this.firstName = firstName;
this.lastName = lastName;
this.score = score;
}
@Override
public int compareTo.
There is something wrong with my program-- (once I do a for view all t.pdf
There is something wrong with my program.. (once I do a for view all this is the outcome in the
console...(carnea:Name: carnea, Address: 30 repeated..) why is this?
import java.util.Scanner;
public class AddressBook {
public static void main(String[] args) {
Tablea addressBook = new Tablea();
Scanner scanner = new Scanner(System.in);
String name, address;
String action = null;
boolean moreEntries = true;
while (moreEntries) {
System.out.println("/nMenu");
System.out.println("n.Add Entry");
System.out.println("d. Delete Entry");
System.out.println("u. Update Entry");
System.out.println("l. Search");
System.out.println("a. View All");
System.out.println("q. Exit");
action = scanner.nextLine();
// Insert a new entry into the address book
switch (action) {
case "n":
System.out.print("Enter a name: ");
name = scanner.nextLine();
System.out.print("Enter an address: ");
address = scanner.nextLine();
addressBook.insert(name, address);
System.out.println("New Contact has been added,");
break;
// Delete an entry from the address book
case "d":
System.out.println("Enter a name to delete: ");
name = scanner.nextLine();
boolean deleted = addressBook.delete(name);
if (deleted) {
System.out.println("Address deleted");
} else {
System.out.println("Name not found");
}
break;
// Update an entry in the address book
case "u":
System.out.print("Enter a name to update: ");
name = scanner.nextLine();
System.out.print("Enter a new address: ");
address = scanner.nextLine();
boolean updated = addressBook.update(name, address);
if (updated) {
System.out.println("Address updated");
} else {
System.out.println("Name not found");
}
break;
// Lookup an entry in the address book
case "l":
System.out.print("Enter a name to look up: ");
name = scanner.nextLine();
String result = addressBook.lookUp(name);
if (result != null) {
System.out.println("Address: " + result);
} else {
System.out.println("Name not found");
}
break;
// Display all entries in the address book
case "a":
System.out.println("All entries:");
addressBook.displayAll();
break;
// Quit the program
case"q":
System.out.println("Quitting...");
}
}
}
}
public class Node {
private String name;
private String address;
private Node next;
public Node(String name, String address) {
// add here ..
this.name = name;
this.address = address;
}
public String getName() {
// add here ..
return this.name;
}
public void setName(String name) {
// add here ..
this.name = name;
}
public String getAddress() {
// add here ..
return this.address;
}
public void setAddress(String address) {
// add here ..
this.address = address;
}
public Node getNext() {
// add here ..
return this.next;
}
public String toString() {
return "Name: "+ name +", Address:" +address;
}
public void setNext(Node node) {
// add here ..
this.next = next;
}
public void setAddress (Object newValue) {
this.address = address;
}
public void setName(Object newValue) {
this.name = name;
}
}
import java.util.Scanner;
public class Tablea {
private Node mark;
public Node get.
How to fix this error- Exception in thread -main- q- Exit java-lang-.pdf
How to fix this error:
Exception in thread "main" q. Exit
java.lang.NullPointerException: Cannot invoke "String.hashCode()" because "action" is null
at AddressBook.main(AddressBook.java:23)
import java.util.Scanner;
public class AddressBook {
public static void main(String[] args) {
Tablea addressBook = new Tablea();
Scanner scanner = new Scanner(System.in);
String name, address;
String action = null;
boolean moreEntries = true;
while (moreEntries) {
System.out.println("/nMenu");
System.out.println("n.Add Entry");
System.out.println("d. Delete Entry");
System.out.println("u. Update Entry");
System.out.println("l. Search");
System.out.println("a. View All");
System.out.println("q. Exit");
// Insert a new entry into the address book
switch (action) {
case "n":
System.out.print("Enter a name: ");
name = scanner.nextLine();
System.out.print("Enter an address: ");
address = scanner.nextLine();
addressBook.insert(name, address);
System.out.println("New Contact has been added,");
System.out.print("Add another entry? (y/n): ");
String answer = scanner.nextLine().toLowerCase();
moreEntries = answer.equals("y") || answer.equals("yes");
break;
// Delete an entry from the address book
case "d":
System.out.println("Enter a name to delete: ");
name = scanner.nextLine();
boolean deleted = addressBook.delete(name);
if (deleted) {
System.out.println("Address deleted");
} else {
System.out.println("Name not found");
}
break;
// Update an entry in the address book
case "u":
System.out.print("Enter a name to update: ");
name = scanner.nextLine();
System.out.print("Enter a new address: ");
address = scanner.nextLine();
boolean updated = addressBook.update(name, address);
if (updated) {
System.out.println("Address updated");
} else {
System.out.println("Name not found");
}
break;
// Lookup an entry in the address book
case "l":
System.out.print("Enter a name to look up: ");
name = scanner.nextLine();
String result = addressBook.lookUp(name);
if (result != null) {
System.out.println("Address: " + result);
} else {
System.out.println("Name not found");
}
break;
// Display all entries in the address book
case "a":
System.out.println("All entries:");
addressBook.displayAll();
break;
// Quit the program
case"q":
System.out.println("Quitting...");
}
}
}
}
OTHER FILES THAT GO WITH THIS
public class Node {
private String name;
private String address;
private Node next;
Node() {
// add here ..
}
Node(String name, String address) {
// add here ..
this.name = name;
this.address = address;
this.next = null;
}
public String getKey() {
// add here ..
return this.name;
}
public void setKey(String name) {
// add here ..
this.name = name;
}
public String getValue() {
// add here ..
return this.address;
}
public void setValue(String address) {
// add here ..
this.address = address;
}
public Node getNext() {
// add here ..
return this.next;
}
public void setNext(Node next) {
// add here ..
this.next = next;
}
}
import java.util.Scanner;
public class Tablea {
private Node mark;
publi.
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ublic class Elevator { private static final String DOWN = down.pdf
ublic class Elevator { private static final String DOWN = \"down\"; private static final
String UP = \"up\"; private final Random rand = new Random(); private int floor =
rand.nextInt(10) + 1; public void simulateElevator() { System.out.println(\"The elevator
is now on floor \" + floor); System.out.print(\"Which floor are you at now (0-10) where 0 =
basement: \"); int destinationFloor = readDestinationFloor(); int movement =
getMovementDirection(destinationFloor); if (movement == 0) {
System.out.println(\"Enter the elevator\"); } else { moveElevator(destinationFloor,
movement); } } private int readDestinationFloor() { return Keyboard.readInt();
} /* determine if movement needed is to up or to down */ private int
getMovementDirection(int destinationFloor) { int dif = destinationFloor - floor; if (dif
== 0) { return 0; } return dif / Math.abs(dif); } private String
getMovementName(int movement) { return movement < 0 ? DOWN : UP; } private
void moveElevator(int destination, int moveDirection) { String movementName =
getMovementName(moveDirection); System.out.println(\"The elevator is on it\'s way
\".concat(movementName).concat(\"...\")); while (floor != destination) { floor +=
moveDirection; System.out.println(floor); } System.out.println(\"The elevator
has arrived\"); } public static void main(String[] args) { new
Elevator().simulateElevator(); } }
Solution
ublic class Elevator { private static final String DOWN = \"down\"; private static final
String UP = \"up\"; private final Random rand = new Random(); private int floor =
rand.nextInt(10) + 1; public void simulateElevator() { System.out.println(\"The elevator
is now on floor \" + floor); System.out.print(\"Which floor are you at now (0-10) where 0 =
basement: \"); int destinationFloor = readDestinationFloor(); int movement =
getMovementDirection(destinationFloor); if (movement == 0) {
System.out.println(\"Enter the elevator\"); } else { moveElevator(destinationFloor,
movement); } } private int readDestinationFloor() { return Keyboard.readInt();
} /* determine if movement needed is to up or to down */ private int
getMovementDirection(int destinationFloor) { int dif = destinationFloor - floor; if (dif
== 0) { return 0; } return dif / Math.abs(dif); } private String
getMovementName(int movement) { return movement < 0 ? DOWN : UP; } private
void moveElevator(int destination, int moveDirection) { String movementName =
getMovementName(moveDirection); System.out.println(\"The elevator is on it\'s way
\".concat(movementName).concat(\"...\")); while (floor != destination) { floor +=
moveDirection; System.out.println(floor); } System.out.println(\"The elevator
has arrived\"); } public static void main(String[] args) { new
Elevator().simulateElevator(); } }.
[Al+] [OH-]^3 = Ksp0.2 [OH-]^3 = 210^-32[OH-] = 4.64210^-1.pdf
[Al+] * [OH-]^3 = Ksp
0.2 * [OH-]^3 = 2*10^-32
[OH-] = 4.642*10^-11
[H+] = Kw/[OH-] = 10^-14/(4.642*10^-11) = 2.154*10^-4 M
pH = -log([H+]) = 3.67
Solution
[Al+] * [OH-]^3 = Ksp
0.2 * [OH-]^3 = 2*10^-32
[OH-] = 4.642*10^-11
[H+] = Kw/[OH-] = 10^-14/(4.642*10^-11) = 2.154*10^-4 M
pH = -log([H+]) = 3.67.
As a CFO environment of internal control needs to put in place t.pdf
As a CFO environment of internal control needs to put in place to ensure account balances
are accurately valued and reported. For this first classification of account balances into high
risk, medium risk and low risk is necessary and then such balances should be reconciled with
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To ensure there is no material mistatement in reporting review at regular intervals is required.
Solution
As a CFO environment of internal control needs to put in place to ensure account balances
are accurately valued and reported. For this first classification of account balances into high
risk, medium risk and low risk is necessary and then such balances should be reconciled with
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To ensure there is no material mistatement in reporting review at regular intervals is required..
What are the financial markets and what purposes do they serveA f.pdf
What are the financial markets and what purposes do they serve?
A financial market is a broad term describing any marketplace where buyers and sellers
participate in the trade of assets such as equities, bonds, currencies and derivatives. Financial
markets are typically defined by having transparent pricing, basic regulations on trading, costs
and fees, and market forces determining the prices of securities that trade.
Financial markets can be found in nearly every nation in the world. Some are very small, with
only a few participants, while others - like the New York Stock Exchange (NYSE) and the forex
markets - trade trillions of dollars daily.
Investors have access to a large number of financial markets and exchanges representing a vast
array of financial products. Some of these markets have always been open to private investors;
others remained the exclusive domain of major international banks and financial professionals
until the very end of the twentieth century.
What are financial intermediaries? How do these intermediaries function in the economy?
Financial intermediaries channel funds from people who have extra money or surplus savings
(savers) to those who do not have enough money to carry out a desired activity (borrowers). A
financial intermediary is typically an institution that facilitates the channeling of funds between
lenders and borrowers indirectly. That is, savers (lenders) give funds to an intermediary
institution (such as a bank), and that institution gives those funds to spenders (borrowers). This
may be in the form of loans or mortgages. Alternatively, they may lend the money directly via
the financial markets, which is known as financial disintermediation.
Financial intermediaries help circulating money in the system. If money is staying idle (e.g.
under your bed pillow or as gold in your locker) then it is not good for the economy. Money
must keep changing hands. If you look at this from a different angle: if nobody buys skin
whitening creams then who will feed the families of those chemists who work there And the
businessman who supplies raw material to that factory? They promote the habit of savings.
Individual can use that saved money in bad times / emergency and earn profit in between. A
needy businessman will easily get loans.
When businessmen can get loans easily at a reasonable cost, they’ll start new business, expand
existing business, hire more employees, increase production of goods / services = GDP
increases. When people are making more money, they spend more money. A family goes to
restaurant, poor waiter makes money. Family hires maid, gardener, driver. Family buys new car,
mobile or bike- it breaks down, the repairman makes money. That’s how money trickles down
from rich people to poor people.
What is a federal government budget deficit? What is the national debt? How does a budget
deficit affect the economy?
The federal government budget deficit is when the Federal spending is greater than the tax
reve.
VI) Instruction set Architecture- Instruction set is a colle.pdf
VI) Instruction set Architecture:-
Instruction set is a collection of the instructions that are executed by the CPU or various
different type of operations are performed in CPU according to this instructions. and it is the part
of the processor that is visible to the compiler writer. It acts as boundary between software and
hardware.And it includes a specification of the set of opcodes, and the native commands.
Instruction set Architecture as Abstract interface:-
The hierarchy of the layers is consisted by the both software and hardware.From the above
layer each lower layer hide the details. The main theme for the abstraction is used for both
hardware and software is complexity of computer systems. One key interface between the levels
of abstraction is the instruction set architrecture. That means the interface between hardware and
low-level software. This abstract interface enables many implementations of varying cost and
performance to run identical software.
MIPS instructions:-
1.R-type instructions
2.I-type instructions
3.J-type instructions
These are the 3-types of MIPS instructions.
R-type instructions means register type instructions. We are using various type of registers to
perform this type of instruction. It is a complex one.
Ex:-R[d]=R[s]+R[t]
I-type instructions are immediate type instructions.
EX:-R[t]=R[s]+(IR15)16 IR15-0.
J-type instructions are jump type instructions.
Ex:-PC<-PC31-28 IR25-0 00
Importance of Standardized ISA:-
Standardized ISA are very important for software. why because it has a high chance to use in
open architecture for industry implementations.and also the main theme is this type ISA provides
modular and simpler instruction set architecture. For example if you take RISC. It is also a
instruction set architecture that was designed to support computer architecture research but it
become a standardized architecture for computer software. because it is simpler and modular. so
more organizations are happy by using this instruction set architrecture.
VII)The computer mainly consists of the five classic components
1.Input unit.
2.Output unit.
3.Memory.
4.ALU
5.Control unit.
1.Input unit:- It is an interaction between the user and the computer which accepts the input
from the user and give it to the computer.
Ex:-Mouse.
2.Output unit:-It is an interaction between the computer and the user which takes the value from
the computer and present it to the user.
Ex:-Monitor
3. Memory:-Memory is used to store the programms.
Ex:-RAM
4.ALU:-All arithmetic and logical operations are performed on the programs by using
Arithmetic and logic unit.
5.Control unit:-Which transfers the control signals to perform the required operations.
VIII. Memory:- The memory is used to store the programs.
They are two types of memorys are there 1.RAM
2.ROM
RAM is temporary memory which are used to store the temporary program.
ROM is a permanent memory which are used to store the permanent program.
RAM memory can be divided into two types 1.Stat.
The OSI(Open System Interconnection) contains 7 layers.1.Physica.pdf
The OSI(Open System Interconnection)
contains 7 layers.
1.Physical layer
2.Data link layer
3.Network layer
4.Transport layer
5.Session layer
6.Presentaion layer
7.Application layer
In above layers, media converter
opreates at layer1, Physical layer .
The physical layer translates
the frames into the bits and the bits
are transmitted to tramission medium
Since physical layer transmits the data
as signals which are in the form of bits
(electrical singals).
Therefore, media converter operates at physical layer.
Solution
The OSI(Open System Interconnection)
contains 7 layers.
1.Physical layer
2.Data link layer
3.Network layer
4.Transport layer
5.Session layer
6.Presentaion layer
7.Application layer
In above layers, media converter
opreates at layer1, Physical layer .
The physical layer translates
the frames into the bits and the bits
are transmitted to tramission medium
Since physical layer transmits the data
as signals which are in the form of bits
(electrical singals).
Therefore, media converter operates at physical layer..
the following statements are true Ubiquinone is a small, hydrophob.pdf
the following statements are true
Ubiquinone is a small, hydrophobic protein containing a metal group that acts as an electron
carrier.Mitochondrial electron carriers with the highest redox potential generally contain copper
ions and/or heme groups.
Solution
the following statements are true
Ubiquinone is a small, hydrophobic protein containing a metal group that acts as an electron
carrier.Mitochondrial electron carriers with the highest redox potential generally contain copper
ions and/or heme groups..
The evolution of one species is driven by the evolution of the other.pdf
The evolution of one species is driven by the evolution of the other species. In this, two groups
of organisms exert selective pressures on each other, which drives the co-evolution of genes, this
may occur within the species or between the species.
The co-evolution of certain insects and flowering plants is driven by their symbiotic relationship.
Increased chances of pollination and seed dispersal by animals and other vectors, and all other
factors that increased the fitness of plants.
The co-evolved animals and plants share certain characteristics the benefit each other. Fruits are
formed after pollination.
The animal pollinator get some reward when it visit its coevolved plant. For example, the co-
evolution of flowers with deep fragrance and UV-reflecting pigments. Bees have a keen sense of
smell and they can also see UV light, so the flowers with these characteristics attract bees and
thus, promotes pollination.
In this case, the bees carry the pollen and nectar, pollen is transported to the other plants or used
by bees and nectar is utilized as a food source by the bees (mutual benefit in coevolution).
Solution
The evolution of one species is driven by the evolution of the other species. In this, two groups
of organisms exert selective pressures on each other, which drives the co-evolution of genes, this
may occur within the species or between the species.
The co-evolution of certain insects and flowering plants is driven by their symbiotic relationship.
Increased chances of pollination and seed dispersal by animals and other vectors, and all other
factors that increased the fitness of plants.
The co-evolved animals and plants share certain characteristics the benefit each other. Fruits are
formed after pollination.
The animal pollinator get some reward when it visit its coevolved plant. For example, the co-
evolution of flowers with deep fragrance and UV-reflecting pigments. Bees have a keen sense of
smell and they can also see UV light, so the flowers with these characteristics attract bees and
thus, promotes pollination.
In this case, the bees carry the pollen and nectar, pollen is transported to the other plants or used
by bees and nectar is utilized as a food source by the bees (mutual benefit in coevolution)..
Student choosed wrong subject. Question was not showning.Solutio.pdf
Student choosed wrong subject. Question was not showning.
Solution
Student choosed wrong subject. Question was not showning..
S(sulfur) atom Glucose molecule and compound Oxygen atom DN.pdf
S(sulfur): atom
Glucose: molecule and compound
Oxygen: atom
DNA: molecule and compound
H2O: molecule and compound
Helium: atom
Ozone: molecule and compound
Carbon Dioxide: molecule and compound
Carbon Monoxide: molecule and compound
HCI: molecule and compound
Sulfuric Acid: molecule and compound
Xe: atom
Uranium: atom
N2O: molecule and compound
N2: molecule
Silver: atom
NaOH: molecule and compound
Gold: atom
NaCL: molecule and compound
Aspirin: molecule and compound
Tungsten: atom
Lead: atom
Epinephrine: molecule and compound
Butane: molecule and compound
Caffeine: molecule and compound
H2: molecule
S8: molecule
Hg: atom
Cholesterol: molecule and compound
I2: molecule
note:
A chemical compound is a pure chemical substance consisting of two or more different
chemical elements.
this is why H2, S8, N2 are not compounds.
Solution
S(sulfur): atom
Glucose: molecule and compound
Oxygen: atom
DNA: molecule and compound
H2O: molecule and compound
Helium: atom
Ozone: molecule and compound
Carbon Dioxide: molecule and compound
Carbon Monoxide: molecule and compound
HCI: molecule and compound
Sulfuric Acid: molecule and compound
Xe: atom
Uranium: atom
N2O: molecule and compound
N2: molecule
Silver: atom
NaOH: molecule and compound
Gold: atom
NaCL: molecule and compound
Aspirin: molecule and compound
Tungsten: atom
Lead: atom
Epinephrine: molecule and compound
Butane: molecule and compound
Caffeine: molecule and compound
H2: molecule
S8: molecule
Hg: atom
Cholesterol: molecule and compound
I2: molecule
note:
A chemical compound is a pure chemical substance consisting of two or more different
chemical elements.
this is why H2, S8, N2 are not compounds..
Question not visible..please post the imageSolutionQuestion no.pdf
Question not visible..please post the image
Solution
Question not visible..please post the image.
Program 1 public class QueueUsingArray { private static final i.pdf
Program 1 :
public class QueueUsingArray {
private static final int queueCapacity = 20;
int arr[] = new int[queueCapacity];
int size = 0;
int top = -1;
int rear = 0;
public void pushinQueue(int pushedElement) {
if (top < queueCapacity - 1) {
top++;
arr[top] = pushedElement;
System.out.println(\"Element \" + pushedElement
+ \" is pushed to Queue !\");
display();
} else {
System.out.println(\"Overflow !\");
}
}
public void pop() {
if (top >= rear) {
rear++;
System.out.println(\"Pop operation done !\");
display();
} else {
System.out.println(\"Underflow !\");
}
}
public void display() {
if (top >= rear) {
System.out.println(\"Elements in Queue : \");
for (int i = rear; i <= top; i++) {
System.out.println(arr[i]);
}
}
}
public static void main(String[] args) {
QueueUsingArray obj = new QueueUsingArray();
obj.pop();
obj.pushinQueue(20);
obj.pushinQueue(18);
obj.pushinQueue(67);
obj.pushinQueue(343);
obj.pop();
obj.pushinQueue(203);
obj.pushinQueue(348);
obj.pushinQueue(637);
obj.pushinQueue(343);
obj.pop();
obj.pop();
obj.pop();
}
}
Result 1 :
348
Element 637 is pushed to Queue !
Elements in Queue :
18
67
343
203
348
637
Element 343 is pushed to Queue !
Elements in Queue :
18
67
343
203
348
637
343
Pop operation done !
Elements in Queue :
67
343
203
348
637
343
Pop operation done !
Elements in Queue :
343
203
348
637
343
Pop operation done !
Elements in Queue :
203
348
637
343
Program 2:
import java.util.Random;
public class InsertionSort {
public static void main(String str[]){
Random rand = new Random();
int arr[] = new int[20];
for(int i=0;i<20;i++){
arr[i]=rand.nextInt(100);
System.out.print(arr[i]+\" \");
}
System.out.println(\"\");
insertionSOrt(arr);
for(int i=0;i<20;i++){
System.out.println(\"arr[\"+i+\"] : \"+arr[i]);
}
}
public static void insertionSOrt(int arr[]){
for(int i=1;i=0 && temp
Solution
Program 1 :
public class QueueUsingArray {
private static final int queueCapacity = 20;
int arr[] = new int[queueCapacity];
int size = 0;
int top = -1;
int rear = 0;
public void pushinQueue(int pushedElement) {
if (top < queueCapacity - 1) {
top++;
arr[top] = pushedElement;
System.out.println(\"Element \" + pushedElement
+ \" is pushed to Queue !\");
display();
} else {
System.out.println(\"Overflow !\");
}
}
public void pop() {
if (top >= rear) {
rear++;
System.out.println(\"Pop operation done !\");
display();
} else {
System.out.println(\"Underflow !\");
}
}
public void display() {
if (top >= rear) {
System.out.println(\"Elements in Queue : \");
for (int i = rear; i <= top; i++) {
System.out.println(arr[i]);
}
}
}
public static void main(String[] args) {
QueueUsingArray obj = new QueueUsingArray();
obj.pop();
obj.pushinQueue(20);
obj.pushinQueue(18);
obj.pushinQueue(67);
obj.pushinQueue(343);
obj.pop();
obj.pushinQueue(203);
obj.pushinQueue(348);
obj.pushinQueue(637);
obj.pushinQueue(343);
obj.pop();
obj.pop();
obj.pop();
}
}
Result 1 :
348
Element 637 is pushed to Queue !
Elements in Queue :
18
67
343
203
348
637
Element 343 is pushed to Que.
PrimeRange.java import java.util.Scanner;public class PrimeRan.pdf
PrimeRange.java
import java.util.Scanner;
public class PrimeRange {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
System.out.println(\"Enter low range:\");
int low = scan.nextInt();
System.out.println(\"Enter high range:\");
int high = scan.nextInt();
for(int i=low; i<=high; i++){
if(isPrime(i))
System.out.print(i+\" \");
}
}
public static boolean isPrime(int n){
for (int f = 2; f < n / 2; f++) {
if (n % f == 0) {
return false;
}
}
return true;
}
}
Output:
Enter low range:
10
Enter high range:
30
11 13 17 19 23 29
Solution
PrimeRange.java
import java.util.Scanner;
public class PrimeRange {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
System.out.println(\"Enter low range:\");
int low = scan.nextInt();
System.out.println(\"Enter high range:\");
int high = scan.nextInt();
for(int i=low; i<=high; i++){
if(isPrime(i))
System.out.print(i+\" \");
}
}
public static boolean isPrime(int n){
for (int f = 2; f < n / 2; f++) {
if (n % f == 0) {
return false;
}
}
return true;
}
}
Output:
Enter low range:
10
Enter high range:
30
11 13 17 19 23 29.
opps no format is there...Solutionopps no format is there....pdf
opps no format is there...
Solution
opps no format is there....
Note Given Code modified as required and required met.pdf
Note:
Given Code modified as required and required methods added.
Code:
// class node
class Node
{
// declare the required variable
String data;
Node next;
// constructor
Node(){}
// constructor with arguments
Node(String data)
{
this.data = data;
next = null;
}
// method to get the data
public String getData()
{
return data;
}
// method to set the data
public void setData(String data)
{
this.data = data;
}
// method to get the next data
public Node getNext()
{
return next;
}
// method to set the next data
public void setNext(Node next)
{
this.next = next;
}
}
// class for a linked list
class MyLInkedList
{
Node head;alue into a list
// method to add the v
public void add(String num)
{
if (head == null)
{
head = new Node(num);
}
else{
Node temp = new Node(num);
Node current = head;
if (current != null) {
while (current.getNext() != null) {
current = current.getNext();
}
current.setNext(temp);
}
}
}
// method to search a value from a list
public void search(String num)
{
Node current = head;
boolean flag=true;
if (current != null)
{
while (current != null)
{
if(current.getData() == num)
{
System.out.println(\"Search value \"+
current.getData()+\" is available\");
flag=false;
}
current = current.getNext();
}
if (flag==true)
{
System.out.println(\"Search value \"+
current.getData()+\" is not available\");
}
}
else
{
System.out.println(\"Linked list is empty\");
}
}
// method to delete a value from a list
public void delete(String num)
{
//Node current = head;
boolean flag=true;
if (head == null)
{
System.out.println(\"Can\'t Delete, Linked list is
empty\");
return;
}
if(head.getData() == num)
{
head=head.getNext();
return;
}
Node temp = new Node(num);
Node cr = head;
Node prev=null;
while ((cr != null) && !(cr.getData() == num))
{
prev=cr;
cr = cr.getNext();
}
prev.setNext(cr.getNext());
}
// method to print the list
public void print()
{
Node current = head;
if (current != null) {
while (current != null) {
System.out.println(current.getData());
current = current.getNext();
}
}
}
}
// method to test the class
public class MyLInkedListTester
{
// main method to perform the linked list operatrions
public static void main(String args[])
{
MyLInkedList llist = new MyLInkedList();
// insert the values into list
llist.add(\"1\");
llist.add(\"2\");
llist.add(\"3\");
llist.add(\"4\");
// print the list values
llist.print();
// sear the values in a list
llist.search(\"1\");
llist.print();
// delete the value from a list
llist.delete(\"4\");
System.out.println(\"List after deletion:\");
llist.print();
}
}
Result:
1
2
3
4
Search value 1 is available
1
2
3
4
List after deletion:
1
2
3
Solution
Note:
Given Code modified as required and required methods added.
Code:
// class node
class Node
{
// declare the required variable
String data;
Node next;
// constructor
Node(){}
// constructor with arguments
Node(String data)
{
this.data = data;
next = null;
}
// method to get the data
public String getData()
{
return data;
}
// method to set the data
public void se.
No, weight is not the measure of quantity of matter.Quantity of ma.pdf
No, weight is not the measure of quantity of matter.
Quantity of matter is \"MASS\".
Weight is the reaction to the force exerted by the the object (mass) on the surface of the earth.
Solution
No, weight is not the measure of quantity of matter.
Quantity of matter is \"MASS\".
Weight is the reaction to the force exerted by the the object (mass) on the surface of the earth..
Two. The pyruvate with carbons 4-6 will go throu.pdf
Two. The pyruvate with carbons 4-6 will go through first.
Solution
Two. The pyruvate with carbons 4-6 will go through first..
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Model Attribute Check Company Auto Property
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
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Listing.javaimport java.util.Scanner;public class Listing { .pdf
- 1. Listing.java import java.util.Scanner; public class Listing { //Declaring instance variables private String name; private int age; //Default constructor public Listing() { name=" "; age=0; } //parameterized Constructor public Listing(String name, int age) { super(); this.name = name; this.age = age; } //Getters and setters public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } //This input() method will take the inputs entered by the user. public void input()
- 2. { //Scanner Object is used to get the data entered by the user Scanner sc=new Scanner(System.in); //Getting the user name System.out.print("Enter Name :"); setName(sc.nextLine()); //Getting the Age System.out.print("Enter Age :"); setAge(sc.nextInt()); } //This toString() method will displays the constents of the user. @Override public String toString() { System.out.println("Name :"+getName()); System.out.println("Name :"+getAge()); return ""; } } _____________________________________________________________ Driver.java public class Driver { public static void main(String[] args) { //Create an array of 3 Listing Objects Listing listing[]=new Listing[3]; //Creating Listing Objects and populating into an Array for(int i=0;i<3;i++) { listing[i]=new Listing(); System.out.println("Listing Object "+(i+1)+":"); //Calling the input method which capture the data entered by the user
- 3. listing[i].input(); } //Displaying the Listing objects in the Normal Order System.out.println("Displaying the Listing Objects in the Normal Order ::"); for(int i=0;i<3;i++) { System.out.println("Listing Object "+(i+1)+":"); listing[i].toString(); System.out.println("_____________________"); } //Displaying the Listing objects in the Reverse Order System.out.println("Displaying the Listing Objects in the Reverse Order ::"); for(int i=2;i>=0;i--) { System.out.println("Listing Object "+(i+1)+":"); listing[i].toString(); System.out.println("_____________________"); } } } _______________________________________________________ Output: Listing Object 1: Enter Name :Kane Williams Enter Age :27 Listing Object 2: Enter Name :John Mills Enter Age :23 Listing Object 3: Enter Name :Tim Rochey Enter Age :22 Displaying the Listing Objects in the Normal Order :: Listing Object 1:
- 4. Name :Kane Williams Name :27 _____________________ Listing Object 2: Name :John Mills Name :23 _____________________ Listing Object 3: Name :Tim Rochey Name :22 _____________________ Displaying the Listing Objects in the Reverse Order :: Listing Object 3: Name :Tim Rochey Name :22 _____________________ Listing Object 2: Name :John Mills Name :23 _____________________ Listing Object 1: Name :Kane Williams Name :27 _____________________ _____________________________________________Thank You Solution Listing.java import java.util.Scanner; public class Listing { //Declaring instance variables private String name; private int age; //Default constructor
- 5. public Listing() { name=" "; age=0; } //parameterized Constructor public Listing(String name, int age) { super(); this.name = name; this.age = age; } //Getters and setters public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } //This input() method will take the inputs entered by the user. public void input() { //Scanner Object is used to get the data entered by the user Scanner sc=new Scanner(System.in); //Getting the user name System.out.print("Enter Name :"); setName(sc.nextLine()); //Getting the Age
- 6. System.out.print("Enter Age :"); setAge(sc.nextInt()); } //This toString() method will displays the constents of the user. @Override public String toString() { System.out.println("Name :"+getName()); System.out.println("Name :"+getAge()); return ""; } } _____________________________________________________________ Driver.java public class Driver { public static void main(String[] args) { //Create an array of 3 Listing Objects Listing listing[]=new Listing[3]; //Creating Listing Objects and populating into an Array for(int i=0;i<3;i++) { listing[i]=new Listing(); System.out.println("Listing Object "+(i+1)+":"); //Calling the input method which capture the data entered by the user listing[i].input(); } //Displaying the Listing objects in the Normal Order System.out.println("Displaying the Listing Objects in the Normal Order ::"); for(int i=0;i<3;i++) { System.out.println("Listing Object "+(i+1)+":"); listing[i].toString();
- 7. System.out.println("_____________________"); } //Displaying the Listing objects in the Reverse Order System.out.println("Displaying the Listing Objects in the Reverse Order ::"); for(int i=2;i>=0;i--) { System.out.println("Listing Object "+(i+1)+":"); listing[i].toString(); System.out.println("_____________________"); } } } _______________________________________________________ Output: Listing Object 1: Enter Name :Kane Williams Enter Age :27 Listing Object 2: Enter Name :John Mills Enter Age :23 Listing Object 3: Enter Name :Tim Rochey Enter Age :22 Displaying the Listing Objects in the Normal Order :: Listing Object 1: Name :Kane Williams Name :27 _____________________ Listing Object 2: Name :John Mills Name :23 _____________________ Listing Object 3: Name :Tim Rochey
- 8. Name :22 _____________________ Displaying the Listing Objects in the Reverse Order :: Listing Object 3: Name :Tim Rochey Name :22 _____________________ Listing Object 2: Name :John Mills Name :23 _____________________ Listing Object 1: Name :Kane Williams Name :27 _____________________ _____________________________________________Thank You