the code below is a recommendation system application to suggest a s.pdf
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the code below is a recommendation system application to suggest a suitable degree program (or department) based on student interest and industry demand. -main class code: package project; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.net.InetAddress; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Scanner; public class project { private static final int MAX_INVALID_INPUTS = 3; private static final String LOG_FILE_PATH = "failed_attempts.txt"; public static void main(String[] args) { SE_dep SE_obj = new SE_dep(); CSAIDepartment csaiDepartment = new CSAIDepartment(); CYDepartment cyDepartment = new CYDepartment(); DS_Dep dsDep = new DS_Dep(); double SE_minIndustSalary; double SE_prevGPA; String SE_interestOfStudent; Scanner input = new Scanner(System.in); System.out.println("Please enter the Minimum acceptable industry salary: "); SE_minIndustSalary = validateInput(input, 10); // Maximum of 10 digits System.out.println("Please Enter Your previous GPA: "); SE_prevGPA = validateInput(input, 2); // Maximum of 2 digits SE_interestOfStudent = validateInterestInput(input); System.out.println("Student inputs: Minimum acceptable industry salary[" + SE_minIndustSalary + "] Previous GPA[" + SE_prevGPA + "] Computer Programming interest[" + SE_interestOfStudent + "]"); System.out.println("Suggested programs:\n\n"); SE_obj.ifIncluded_SE(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); cyDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); csaiDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); dsDep.DS_Program(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); double studyHours = SE_prevGPA * 1.0; // Each GPA point corresponds to 1 hour of study int hours = (int) studyHours; // Extract the integer part (hours) int minutes = (int) ((studyHours - hours) * 60); // Calculate the minutes System.out.println("Required study hours (at home beside lectures): " + hours + " hours and " + minutes + " minutes"); input.close(); } private static double validateInput(Scanner input, int maxDigits) { int invalidInputs = 0; while (invalidInputs < MAX_INVALID_INPUTS) { String userInput = input.next(); try { double value = Double.parseDouble(userInput); if (userInput.length() <= maxDigits) { return value; // Input has the desired number of digits, return the value } else { System.out.println("Invalid input! Please enter a number with no more than " + maxDigits + " digits: "); invalidInputs++; } } catch (NumberFormatException e) { invalidInputs++; System.out.println("Invalid input! Please enter a valid number: "); } } System.out.println("Maximum number of invalid inputs reached. Exiting..."); logFailedAttempt("Invalid input: " + input); System.exit(0); // Terminate the program gracefully return 0; // This line won't be executed, added to satisfy the method return type } private static String validateInterestInput(Scanner input) { .
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![the code below is a recommendation system application to suggest a suitable degree program (or
department) based on student interest and industry demand.
-main class code:
package project;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
public class project {
private static final int MAX_INVALID_INPUTS = 3;
private static final String LOG_FILE_PATH = "failed_attempts.txt";
public static void main(String[] args) {
SE_dep SE_obj = new SE_dep();
CSAIDepartment csaiDepartment = new CSAIDepartment();
CYDepartment cyDepartment = new CYDepartment();
DS_Dep dsDep = new DS_Dep();
double SE_minIndustSalary;
double SE_prevGPA;
String SE_interestOfStudent;
Scanner input = new Scanner(System.in);
System.out.println("Please enter the Minimum acceptable industry salary: ");
SE_minIndustSalary = validateInput(input, 10); // Maximum of 10 digits
System.out.println("Please Enter Your previous GPA: ");
SE_prevGPA = validateInput(input, 2); // Maximum of 2 digits
SE_interestOfStudent = validateInterestInput(input);
System.out.println("Student inputs: Minimum acceptable industry salary[" +
SE_minIndustSalary + "] Previous GPA[" + SE_prevGPA + "] Computer Programming
interest[" + SE_interestOfStudent + "]");
System.out.println("Suggested programs:nn");](https://image.slidesharecdn.com/thecodebelowisarecommendationsystemapplicationtosuggestas-231005213700-4f3b5461/85/the-code-below-is-a-recommendation-system-application-to-suggest-a-s-pdf-1-320.jpg)
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- the modification will be done in Main class
- first, asks the user if it is a regular user or from the company.
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note:
-the code:
package project;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
public class project {
private static final int MAX_INVALID_INPUTS = 3;
private static final String LOG_FILE_PATH = "failed_attempts.txt";
public static void main(String[] args) {
SE_dep SE_obj = new SE_dep();
CSAI_Dep csaiDepartment = new CSAI_Dep();
CY_Dep cyDepartment = new CY_Dep();
DS_Dep dsDep = new DS_Dep();
double SE_minIndustSalary;
double SE_prevGPA;
String SE_interestOfStudent;
Scanner input = new Scanner(System.in);
System.out.println("Please enter the Minimum acceptable industry salary: ");
SE_minIndustSalary = validateInput(input, 10); // Maximum of 10 digits
System.out.println("Please Enter Your previous GPA: ");
SE_prevGPA = validateInput(input, 3); // Maximum of 3 digits
SE_interestOfStudent = validateInterestInput(input);
System.out.println("Student inputs: Minimum acceptable industry salary[" +
SE_minIndustSalary + "] Previous GPA[" + SE_prevGPA + "] Computer Programming
interest[" + SE_interestOfStudent + "]");
System.out.println("Suggested programs:\n\n");
SE_obj.ifIncluded_SE(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent);
cyDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA,
SE_interestOfStudent);
csaiDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA,
SE_interestOfStudent);
dsDep.DS_Program(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent);
double studyHours = SE_prevGPA * 1.0; // Each GPA point corresponds to 1 hour of study
int hours = (int) studyHours; // Extract the integer part (hours)
int minutes = (int) ((studyHours - hours) * 60); // Calculate the minutes
System.out.println("Required study hours (at home beside lectures): " + hours + " hours and
" + minutes + " minutes");
input.close();
}
private static double validateInput(Scanner input, int maxDigits) {
int invalidInputs = 0;
while (invalidInputs < MAX_INVALID_INPUTS) {
String userInput = input.next();
try {
double value = Double.parseDouble(userInput);
if (userInput.length() <= maxDigits) {
return value; // Input has the desired number of digits, return the value
} else {
System.out.println("Invalid input! Please enter a number with no more than " +
maxDigits + " digits: ");
invalidInputs++;
}
} catch (NumberFormatException e) {
invalidInputs++;
System.out.println("Invalid input! Please enter a valid number: ");
}
}
System.out.println("Maximum number of invalid inputs reached. Exiting...");
logFailedAttempt("Invalid input: " + input);
System.exit(0); // Terminate the program gracefully
return 0; // This line won't be executed, added to satisfy the method return type
}
private static String validateInterestInput(Scanner input).
My code is below How do I write this code without usin.pdf
My code is below...... How do I write this code without using arrays? I also need to write it without
using the while (true) or using a break statement. I need to use a prime read and a sentinel value
to control the repetition.
import java.text.DecimalFormat;
import java.util.Scanner;
public class AuthorPay2 {
public static void main(String[] args) {
//Declaring variables
double largestAmount = 0.0, avgAmt = 0.0, totAmount = 0.0;
int totNoOfPayments = 0;
//Creating an integer array
int[] countPayLevels = new int[3];
//DecimalFormat class is used to format the output
DecimalFormat df = new DecimalFormat(".00");
/*
*Creating an Scanner class object which is used to get the inputs
*entered by the user
*/
Scanner sc = new Scanner(System.in);
while (true) {
//Getting the input entered by the user
System.out.print("Enter the length of the story: ");
int length = sc.nextInt();
if (length != -1) {
System.out.print("Enter the level of the author: ");
char level = sc.next().charAt(0);
double amount = calculateAmount(length, level);
if (largestAmount < amount) {
largestAmount = amount;
}
totAmount += amount;
totNoOfPayments++;
if (level == 'A' || length == 'a') {
countPayLevels[0]++;
} else if (level == 'B' || length == 'b') {
countPayLevels[1]++;
} else if (level == 'C' || length == 'c') {
countPayLevels[2]++;
}
System.out.println("Length of the story: " + length + " Amount to be paid; $" + df.format(amount));
} else {
avgAmt = totAmount / totNoOfPayments;
System.out.println("nTotal no of payments: " + totNoOfPayments);
System.out.println("No of Payments made at level 'A': " + countPayLevels[0]);
System.out.println("No of Payments made at level 'B': " + countPayLevels[1]);
System.out.println("No of Payments made at level 'C': " + countPayLevels[2]);
System.out.printf("The average amount paid for a story: %.2fn", avgAmt);
System.out.printf("The largest amount paid for a story: %.2fn", largestAmount);
break;
}
}
}
private static double calculateAmount(int length, char level) {
double amount = 0.0;
if (length < 7500) {
amount = 0.08 * length;
} else if (length >= 7500 && length < 8000) {
amount = 600;
} else if (length >= 8000 && length < 17500) {
amount = 0.075 * length;
} else if (length >= 17500 && length <= 190000) {
amount = 1313;
} else if (length > 19000) {
amount = 0.07 * length;
}
if (level == 'A' || length == 'a') {
amount = 1.75 * amount;
} else if (level == 'B' || length == 'b') {
amount = 1.25 * amount;
}
return amount;
}
}.
Recommended
- the modification will be done in Main class- first, asks the use.pdf
- the modification will be done in Main class
- first, asks the user if it is a regular user or from the company.
-second, compare the username and password if it is from a company.
note:
-the code:
package project;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
public class project {
private static final int MAX_INVALID_INPUTS = 3;
private static final String LOG_FILE_PATH = "failed_attempts.txt";
public static void main(String[] args) {
SE_dep SE_obj = new SE_dep();
CSAI_Dep csaiDepartment = new CSAI_Dep();
CY_Dep cyDepartment = new CY_Dep();
DS_Dep dsDep = new DS_Dep();
double SE_minIndustSalary;
double SE_prevGPA;
String SE_interestOfStudent;
Scanner input = new Scanner(System.in);
System.out.println("Please enter the Minimum acceptable industry salary: ");
SE_minIndustSalary = validateInput(input, 10); // Maximum of 10 digits
System.out.println("Please Enter Your previous GPA: ");
SE_prevGPA = validateInput(input, 3); // Maximum of 3 digits
SE_interestOfStudent = validateInterestInput(input);
System.out.println("Student inputs: Minimum acceptable industry salary[" +
SE_minIndustSalary + "] Previous GPA[" + SE_prevGPA + "] Computer Programming
interest[" + SE_interestOfStudent + "]");
System.out.println("Suggested programs:\n\n");
SE_obj.ifIncluded_SE(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent);
cyDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA,
SE_interestOfStudent);
csaiDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA,
SE_interestOfStudent);
dsDep.DS_Program(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent);
double studyHours = SE_prevGPA * 1.0; // Each GPA point corresponds to 1 hour of study
int hours = (int) studyHours; // Extract the integer part (hours)
int minutes = (int) ((studyHours - hours) * 60); // Calculate the minutes
System.out.println("Required study hours (at home beside lectures): " + hours + " hours and
" + minutes + " minutes");
input.close();
}
private static double validateInput(Scanner input, int maxDigits) {
int invalidInputs = 0;
while (invalidInputs < MAX_INVALID_INPUTS) {
String userInput = input.next();
try {
double value = Double.parseDouble(userInput);
if (userInput.length() <= maxDigits) {
return value; // Input has the desired number of digits, return the value
} else {
System.out.println("Invalid input! Please enter a number with no more than " +
maxDigits + " digits: ");
invalidInputs++;
}
} catch (NumberFormatException e) {
invalidInputs++;
System.out.println("Invalid input! Please enter a valid number: ");
}
}
System.out.println("Maximum number of invalid inputs reached. Exiting...");
logFailedAttempt("Invalid input: " + input);
System.exit(0); // Terminate the program gracefully
return 0; // This line won't be executed, added to satisfy the method return type
}
private static String validateInterestInput(Scanner input).
My code is below How do I write this code without usin.pdf
My code is below...... How do I write this code without using arrays? I also need to write it without
using the while (true) or using a break statement. I need to use a prime read and a sentinel value
to control the repetition.
import java.text.DecimalFormat;
import java.util.Scanner;
public class AuthorPay2 {
public static void main(String[] args) {
//Declaring variables
double largestAmount = 0.0, avgAmt = 0.0, totAmount = 0.0;
int totNoOfPayments = 0;
//Creating an integer array
int[] countPayLevels = new int[3];
//DecimalFormat class is used to format the output
DecimalFormat df = new DecimalFormat(".00");
/*
*Creating an Scanner class object which is used to get the inputs
*entered by the user
*/
Scanner sc = new Scanner(System.in);
while (true) {
//Getting the input entered by the user
System.out.print("Enter the length of the story: ");
int length = sc.nextInt();
if (length != -1) {
System.out.print("Enter the level of the author: ");
char level = sc.next().charAt(0);
double amount = calculateAmount(length, level);
if (largestAmount < amount) {
largestAmount = amount;
}
totAmount += amount;
totNoOfPayments++;
if (level == 'A' || length == 'a') {
countPayLevels[0]++;
} else if (level == 'B' || length == 'b') {
countPayLevels[1]++;
} else if (level == 'C' || length == 'c') {
countPayLevels[2]++;
}
System.out.println("Length of the story: " + length + " Amount to be paid; $" + df.format(amount));
} else {
avgAmt = totAmount / totNoOfPayments;
System.out.println("nTotal no of payments: " + totNoOfPayments);
System.out.println("No of Payments made at level 'A': " + countPayLevels[0]);
System.out.println("No of Payments made at level 'B': " + countPayLevels[1]);
System.out.println("No of Payments made at level 'C': " + countPayLevels[2]);
System.out.printf("The average amount paid for a story: %.2fn", avgAmt);
System.out.printf("The largest amount paid for a story: %.2fn", largestAmount);
break;
}
}
}
private static double calculateAmount(int length, char level) {
double amount = 0.0;
if (length < 7500) {
amount = 0.08 * length;
} else if (length >= 7500 && length < 8000) {
amount = 600;
} else if (length >= 8000 && length < 17500) {
amount = 0.075 * length;
} else if (length >= 17500 && length <= 190000) {
amount = 1313;
} else if (length > 19000) {
amount = 0.07 * length;
}
if (level == 'A' || length == 'a') {
amount = 1.75 * amount;
} else if (level == 'B' || length == 'b') {
amount = 1.25 * amount;
}
return amount;
}
}.
Review Questions for Exam 10182016 1. public class .pdf
Q3 GIVEN THE TREND EQUATION NO OF STUDENTS-3000+200 YEAR BASE: 2003-0
1.INTERPRET EQUATION RESULTS 2.FORECAST FOR 2020 3.WHEN WILL THE NO OF
STUDENTS REACH 6000
Solution
x no of years from 2003 y no of students y = 3000+200x 1) The regression
equation has a positive slope of 200 y intercept is 3000 i.e. no of students in the year 2000
Thus for every year 200 students increase 2) For 2020, x = 17, y = 3000+200(17) = 6400
3) When y =6000, 6000 = 3000+200x or x = 15 Hence in year 2018 students reach 6000
B Regression C D. All the above.
DAOFactory.javaDAOFactory.javapublicclassDAOFactory{ this .docx
DAOFactory.javaDAOFactory.javapublicclassDAOFactory
{
// this method maps the ProductDAO interface
// to the appropriate data storage mechanism
publicstaticProductDAOÂ getProductDAO()
{
ProductDAOÂ pDAOÂ =newProductTextFile();
return pDAO;
}
}
IOStringUtils.javaIOStringUtils.javaimport java.io.*;
publicclassIOStringUtils
{
publicstaticvoid writeFixedString(DataOutput out,int length,
String s)throwsIOException
{
for(int i =0; i < length; i++)
{
if(i < s.length())
                out.writeChar(s.charAt(i));// write char
else
                out.writeChar(0);// write Unicode zero
}
}
publicstaticString readFixedString(DataInput in,int length)
throwsIOException
{
StringBuilder sb =newStringBuilder();
for(int i =0; i < length; i++)
{
char c = in.readChar();
// if char is not Unicode zero add to string
if(c !=0)
                sb.append(c);
}
return sb.toString();
}
}
Product.javaProduct.javaimport java.text.NumberFormat;
publicclassProduct
{
privateString code;
privateString description;
privatedouble price;
publicProduct()
{
this("","",0);
}
publicProduct(String code,String description,double price)
{
this.code = code;
this.description = description;
this.price = price;
}
publicvoid setCode(String code)
{
this.code = code;
}
publicString getCode(){
return code;
}
publicvoid setDescription(String description)
{
this.description = description;
}
publicString getDescription()
{
return description;
}
publicvoid setPrice(double price)
{
this.price = price;
}
publicdouble getPrice()
{
return price;
}
publicString getFormattedPrice()
{
NumberFormat currency =NumberFormat.getCurrencyInstance();
return currency.format(price);
}
publicboolean equals(Object object)
{
if(object instanceofProduct)
{
Product product2 =(Product) object;
if
(
                code.equals(product2.getCode())&&
                description.equals(product2.getDescription())&&
                price == product2.getPrice()
)
returntrue;
}
returnfalse;
}
publicString toString()
{
return"Code:        "+ code +"\n"+
"Description: "+ description +"\n"+
"Price:Â Â Â Â Â Â Â "+this.getFormattedPrice()+"\n";
}
}
ProductConstants.javaProductConstants.javapublicinterfaceProductConstants
{
int CODE_SIZE =4;
int DESCRIPTION_SIZE =40;
}
ProductDAO.javaProductDAO.javapublicinterfaceProductDAOextendsProductReader,ProductWriter,ProductConstants
{
// all methods from the ProductReader and ProductWriter interfaces
// all static constants from the ProductConstants interface
}
ProductMaintApp.javaProductMaintApp.javaimport java.util.Scanner;
import java.util.ArrayList;
publicclassProductMaintAppimplementsProductConstants
{
// declare two class variables
privatestaticProductDAOÂ productDAOÂ =null;
privatestaticScanner sc =null;
publicstaticvoid main(String args[])
{
// display a welcome message
System.out.println("Welcome to the Product Maintenance application\n");
// set the class variables
        productDAO =DAOFactory.getProductDAO();
        sc =newScanner(System.in);
// display the c.
Write the code above and the ones below in netbeans IDE 8.13. (Eli.pdf
Write the code above and the ones below in netbeans IDE 8.1
3. (Eliminate duplicates) Write a method that returns a new array by eliminating the duplicate
values in the array using the following method header: public static int[]
eliminateDuplicates(int[] list) Write a test program that reads in ten integers, invokes the method,
and displays the result. Here is the sample run of the program:
Enter ten numbers: 1 2 3 2 1 6 3 4 5 2 [Enter]
The distinct numbers are: 1 2 3 6 4 5
4. (Sort students) Write a program that prompts the user to enter the number of students, the
students’ names, and their scores, and prints student names in decreasing order of their scores.
Solution
Please follow the code and comments for description :
a)
CODE :
import java.util.Scanner;
public class MeanSD {
public static double deviation (double[] x) { // method to return the deviation
double sum = 0, mean = 0, deviation = 0; // required initialisations
double[] temp = new double[10]; // temporary array
for (int i = 0; i < 10; i++) //calculate the standard deviation
{
temp[i] = Math.pow((x[i] - mean), 2); // assigning the value to the array
sum += temp[i]; // adding up the values
}
mean = sum / 10; // getting the mean
deviation = Math.sqrt(mean); // calculating the deviation
return deviation; // returning the deviation
}
public static double mean (double[] x) { // method to return themean of the values entered
double sum = 0, mean; // required initialisations
for (int i = 0; i < 10; i++) //Take input in the array
{
sum += x[i]; //sum of all elements
}
mean = sum / 10; // calculating the mean
return mean; // returning the mean value
}
public static void main(String[] args) { // driver method
System.out.println(\"Enter the 10 numbers.\"); // prompt to enter the data
Scanner in = new Scanner(System.in); // scanner class to get the data from the user
double[] arr = new double[10]; // array that saves the data
double sum = 0, mean = 0, deviation = 0; // required initialisations
for (int i = 0; i < 10; i++) //Take input in the array
{
System.out.print(\"Enter a number : \"); // prompt to enter the number
arr[i] = in.nextDouble(); // getting the data from the console
}
mean = mean(arr); // calling the method to return the mean value
System.out.println(\"Mean : \" + mean); //Display mean of all elements
deviation = deviation(arr); // calling the method to return teh deviation value
System.out.println(\"Deviation : \" + deviation); // display the result
}
}
OUPTPUT :
Enter the 10 numbers.
Enter a number : 1
Enter a number : 2
Enter a number : 3
Enter a number : 4
Enter a number : 5
Enter a number : 6
Enter a number : 7
Enter a number : 8
Enter a number : 9
Enter a number : 10
Mean : 5.5
Deviation : 6.2048368229954285
b)
CODE :
import java.util.Scanner;
public class MyDuplicateElements {
public static int[] eliminateDuplicates(int[] input) { // method to remove the duplicates
int j = 0; // required initialisations
int i = 1;
//return if the array length is less than 2
if (input..
programming for Calculator in java
WAP to create equivalent of a four function calculator. The program requires the user to enter two numbers and an operator. It then carries out the specified arithmetic operation: addition, subtraction, multiplication and division of two numbers.(using nested if statement)
Java programs
Sample java programs for beginners. This slides can help you to print few words in java. Also it helps to do arithmetic calculations and will give you basic concept of for loop, do while loop and if else statements in java. Area of a square.
JAVA Question : Programming Assignment
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tell what the program will print to the file and the screen.1. i.pdf
tell what the program will print to the file and the screen.
1. import java.io.*;
public class pf1
{
public static void main(String[] args) throws IOException
{
int i, j;
String[] day = {"Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday", "Sunday"};
OutputStream os;
File dof = new File("days.txt");
os = new FileOutputStream(dof);
try
{
for (i = 0; i < day.length; i++)
{
if (day[i].charAt(3) == (char)100)
{
for (j = 0; j < day[i].length(); j++)
os.write(day[i].charAt(j));
os.write('\n');
}
}
}
catch(IOException ex)
{
System.out.println(ex.getMessage());
}
os.close();
System.out.println(dof.getPath());
System.out.println(dof.length());
}
}.
Task 1 Demonstrating Inheritance.pdf
Task 1: Demonstrating Inheritance
Task 2: Demonstrating Polymorphism
public String DisplayInfo() {
return "\n" + ShapeName + "\nArea="+area+ "\nPerimeter="+perimeter;
}
The superclass has the following instance variables: ShapeName (String), Area (double) and
Perimeter(double). Also create an instance methods setArea and setPerimeter..
More Related Content
Similar to the code below is a recommendation system application to suggest a s.pdf
Review Questions for Exam 10182016 1. public class .pdf
Q3 GIVEN THE TREND EQUATION NO OF STUDENTS-3000+200 YEAR BASE: 2003-0
1.INTERPRET EQUATION RESULTS 2.FORECAST FOR 2020 3.WHEN WILL THE NO OF
STUDENTS REACH 6000
Solution
x no of years from 2003 y no of students y = 3000+200x 1) The regression
equation has a positive slope of 200 y intercept is 3000 i.e. no of students in the year 2000
Thus for every year 200 students increase 2) For 2020, x = 17, y = 3000+200(17) = 6400
3) When y =6000, 6000 = 3000+200x or x = 15 Hence in year 2018 students reach 6000
B Regression C D. All the above.
DAOFactory.javaDAOFactory.javapublicclassDAOFactory{ this .docx
DAOFactory.javaDAOFactory.javapublicclassDAOFactory
{
// this method maps the ProductDAO interface
// to the appropriate data storage mechanism
publicstaticProductDAOÂ getProductDAO()
{
ProductDAOÂ pDAOÂ =newProductTextFile();
return pDAO;
}
}
IOStringUtils.javaIOStringUtils.javaimport java.io.*;
publicclassIOStringUtils
{
publicstaticvoid writeFixedString(DataOutput out,int length,
String s)throwsIOException
{
for(int i =0; i < length; i++)
{
if(i < s.length())
                out.writeChar(s.charAt(i));// write char
else
                out.writeChar(0);// write Unicode zero
}
}
publicstaticString readFixedString(DataInput in,int length)
throwsIOException
{
StringBuilder sb =newStringBuilder();
for(int i =0; i < length; i++)
{
char c = in.readChar();
// if char is not Unicode zero add to string
if(c !=0)
                sb.append(c);
}
return sb.toString();
}
}
Product.javaProduct.javaimport java.text.NumberFormat;
publicclassProduct
{
privateString code;
privateString description;
privatedouble price;
publicProduct()
{
this("","",0);
}
publicProduct(String code,String description,double price)
{
this.code = code;
this.description = description;
this.price = price;
}
publicvoid setCode(String code)
{
this.code = code;
}
publicString getCode(){
return code;
}
publicvoid setDescription(String description)
{
this.description = description;
}
publicString getDescription()
{
return description;
}
publicvoid setPrice(double price)
{
this.price = price;
}
publicdouble getPrice()
{
return price;
}
publicString getFormattedPrice()
{
NumberFormat currency =NumberFormat.getCurrencyInstance();
return currency.format(price);
}
publicboolean equals(Object object)
{
if(object instanceofProduct)
{
Product product2 =(Product) object;
if
(
                code.equals(product2.getCode())&&
                description.equals(product2.getDescription())&&
                price == product2.getPrice()
)
returntrue;
}
returnfalse;
}
publicString toString()
{
return"Code:        "+ code +"\n"+
"Description: "+ description +"\n"+
"Price:Â Â Â Â Â Â Â "+this.getFormattedPrice()+"\n";
}
}
ProductConstants.javaProductConstants.javapublicinterfaceProductConstants
{
int CODE_SIZE =4;
int DESCRIPTION_SIZE =40;
}
ProductDAO.javaProductDAO.javapublicinterfaceProductDAOextendsProductReader,ProductWriter,ProductConstants
{
// all methods from the ProductReader and ProductWriter interfaces
// all static constants from the ProductConstants interface
}
ProductMaintApp.javaProductMaintApp.javaimport java.util.Scanner;
import java.util.ArrayList;
publicclassProductMaintAppimplementsProductConstants
{
// declare two class variables
privatestaticProductDAOÂ productDAOÂ =null;
privatestaticScanner sc =null;
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{
// display a welcome message
System.out.println("Welcome to the Product Maintenance application\n");
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Write the code above and the ones below in netbeans IDE 8.13. (Eli.pdf
Write the code above and the ones below in netbeans IDE 8.1
3. (Eliminate duplicates) Write a method that returns a new array by eliminating the duplicate
values in the array using the following method header: public static int[]
eliminateDuplicates(int[] list) Write a test program that reads in ten integers, invokes the method,
and displays the result. Here is the sample run of the program:
Enter ten numbers: 1 2 3 2 1 6 3 4 5 2 [Enter]
The distinct numbers are: 1 2 3 6 4 5
4. (Sort students) Write a program that prompts the user to enter the number of students, the
students’ names, and their scores, and prints student names in decreasing order of their scores.
Solution
Please follow the code and comments for description :
a)
CODE :
import java.util.Scanner;
public class MeanSD {
public static double deviation (double[] x) { // method to return the deviation
double sum = 0, mean = 0, deviation = 0; // required initialisations
double[] temp = new double[10]; // temporary array
for (int i = 0; i < 10; i++) //calculate the standard deviation
{
temp[i] = Math.pow((x[i] - mean), 2); // assigning the value to the array
sum += temp[i]; // adding up the values
}
mean = sum / 10; // getting the mean
deviation = Math.sqrt(mean); // calculating the deviation
return deviation; // returning the deviation
}
public static double mean (double[] x) { // method to return themean of the values entered
double sum = 0, mean; // required initialisations
for (int i = 0; i < 10; i++) //Take input in the array
{
sum += x[i]; //sum of all elements
}
mean = sum / 10; // calculating the mean
return mean; // returning the mean value
}
public static void main(String[] args) { // driver method
System.out.println(\"Enter the 10 numbers.\"); // prompt to enter the data
Scanner in = new Scanner(System.in); // scanner class to get the data from the user
double[] arr = new double[10]; // array that saves the data
double sum = 0, mean = 0, deviation = 0; // required initialisations
for (int i = 0; i < 10; i++) //Take input in the array
{
System.out.print(\"Enter a number : \"); // prompt to enter the number
arr[i] = in.nextDouble(); // getting the data from the console
}
mean = mean(arr); // calling the method to return the mean value
System.out.println(\"Mean : \" + mean); //Display mean of all elements
deviation = deviation(arr); // calling the method to return teh deviation value
System.out.println(\"Deviation : \" + deviation); // display the result
}
}
OUPTPUT :
Enter the 10 numbers.
Enter a number : 1
Enter a number : 2
Enter a number : 3
Enter a number : 4
Enter a number : 5
Enter a number : 6
Enter a number : 7
Enter a number : 8
Enter a number : 9
Enter a number : 10
Mean : 5.5
Deviation : 6.2048368229954285
b)
CODE :
import java.util.Scanner;
public class MyDuplicateElements {
public static int[] eliminateDuplicates(int[] input) { // method to remove the duplicates
int j = 0; // required initialisations
int i = 1;
//return if the array length is less than 2
if (input..
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Â
DAOFactory.javaDAOFactory.javapublicclassDAOFactory{ this .docx
DAOFactory.javaDAOFactory.javapublicclassDAOFactory{ this .docx
Â
Write the code above and the ones below in netbeans IDE 8.13. (Eli.pdf
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Â
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the code below is a recommendation system application to suggest a s.pdf
- 1. the code below is a recommendation system application to suggest a suitable degree program (or department) based on student interest and industry demand. -main class code: package project; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.net.InetAddress; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Scanner; public class project { private static final int MAX_INVALID_INPUTS = 3; private static final String LOG_FILE_PATH = "failed_attempts.txt"; public static void main(String[] args) { SE_dep SE_obj = new SE_dep(); CSAIDepartment csaiDepartment = new CSAIDepartment(); CYDepartment cyDepartment = new CYDepartment(); DS_Dep dsDep = new DS_Dep(); double SE_minIndustSalary; double SE_prevGPA; String SE_interestOfStudent; Scanner input = new Scanner(System.in); System.out.println("Please enter the Minimum acceptable industry salary: "); SE_minIndustSalary = validateInput(input, 10); // Maximum of 10 digits System.out.println("Please Enter Your previous GPA: "); SE_prevGPA = validateInput(input, 2); // Maximum of 2 digits SE_interestOfStudent = validateInterestInput(input); System.out.println("Student inputs: Minimum acceptable industry salary[" + SE_minIndustSalary + "] Previous GPA[" + SE_prevGPA + "] Computer Programming interest[" + SE_interestOfStudent + "]"); System.out.println("Suggested programs:nn");
- 2. SE_obj.ifIncluded_SE(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); cyDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); csaiDepartment.recommendPrograms(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); dsDep.DS_Program(SE_minIndustSalary, SE_prevGPA, SE_interestOfStudent); double studyHours = SE_prevGPA * 1.0; // Each GPA point corresponds to 1 hour of study int hours = (int) studyHours; // Extract the integer part (hours) int minutes = (int) ((studyHours - hours) * 60); // Calculate the minutes System.out.println("Required study hours (at home beside lectures): " + hours + " hours and " + minutes + " minutes"); input.close(); } private static double validateInput(Scanner input, int maxDigits) { int invalidInputs = 0; while (invalidInputs < MAX_INVALID_INPUTS) { String userInput = input.next(); try { double value = Double.parseDouble(userInput); if (userInput.length() <= maxDigits) { return value; // Input has the desired number of digits, return the value } else { System.out.println("Invalid input! Please enter a number with no more than " + maxDigits + " digits: "); invalidInputs++; } } catch (NumberFormatException e) { invalidInputs++; System.out.println("Invalid input! Please enter a valid number: "); } } System.out.println("Maximum number of invalid inputs reached. Exiting..."); logFailedAttempt("Invalid input: " + input); System.exit(0); // Terminate the program gracefully return 0; // This line won't be executed, added to satisfy the method return type }
- 3. private static String validateInterestInput(Scanner input) { int invalidInputs = 0; while (invalidInputs < MAX_INVALID_INPUTS) { System.out.println("Please enter Computer Programming interest (Low, Medium, High, or Very high): "); String userInput = input.next(); if (userInput.equalsIgnoreCase("Low") || userInput.equalsIgnoreCase("Medium") || userInput.equalsIgnoreCase("High") || userInput.equalsIgnoreCase("Very high")) { return userInput; } else { invalidInputs++; System.out.println("Invalid input! Please enter a valid interest level."); } } System.out.println("Maximum number of invalid inputs reached. Exiting..."); logFailedAttempt("Invalid input: " + input); System.exit(0); // Terminate the program gracefully return ""; // This line won't be executed, added to satisfy the method return type } private static void logFailedAttempt(String prompt) { try (PrintWriter writer = new PrintWriter(new FileWriter(LOG_FILE_PATH, true))) { InetAddress ip = InetAddress.getLocalHost(); String currentTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()); writer.println("Failed attempt at " + currentTime + " from IP: " + ip.getHostAddress()); writer.println(); } catch (IOException e) { System.out.println("Failed to log the failed attempt."); }}} Note: - The program should be written using Java language - Need the solution Step by step