C# Application program UNIT III
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This document discusses building Windows applications using tree view and file compare controls to copy and delete files between directories. It also discusses building a web application in ASP.NET and accessing data using ADO.NET. Key aspects covered include filling a tree view with directories and files, getting checked files, comparing files, and handling copy and delete button clicks by getting file lists and performing the operations. Building a web form and adding a data source to select from a database table are also summarized.
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Type Conversion
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Logical Operators
If Statement
If… Else Statement
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type E and each node is linked not only forward to the next element in the list but also backward
to the previous element in the list. Your implementation should adapt and implement all the
methods of generic Node including the following methods:
Constructor for DoublyNode
addNodeAfter, removeNodeAfter
getData, setData
getForeLink, setForeLink
getBackLink, setBackLink
listCopy
listCopyWithTail
listLength
listPart
listPosition
listSearch
Solution
import java.util.ListIterator;
import java.util.NoSuchElementException;
import java.util.Random;
public class DoublyNode {
private Node head;
private Node tail;
private int size;
public DoublyNode() {
size = 0;
}
private class Node {
E element;
Node getForeNode;
Node getBackNode;
public Node(E element, Node next, Node prev) {
this.element = element;
this.getForeNode = next;
this.getBackNode = prev;
}
}
public int listLength() { return size; }
public boolean isEmpty() { return size == 0; }
public void addFirst(E element) {
Node tmp = new Node(element, head, null);
if(head != null ) {head.getBackNode = tmp;}
head = tmp;
if(tail == null) { tail = tmp;}
size++;
System.out.println(\"adding: \"+element);
}
public void addNodeAfter(E element) {
Node tmp = new Node(element, null, tail);
if(tail != null) {tail.getForeNode = tmp;}
tail = tmp;
if(head == null) { head = tmp;}
size++;
System.out.println(\"adding: \"+element);
}
public void addNodeAfterSpecifiedNode(E element, E tobeAddedAfter) {
Node prevTobeAddedAfter = listSearch(element);
Node afterNode = prevTobeAddedAfter.getForeNode;
Node tmpNode = new Node(element,prevTobeAddedAfter,afterNode);
tmpNode = prevTobeAddedAfter.getForeNode;
afterNode = tmpNode.getForeNode;
}
public void listCopy(){
System.out.println(\"iterating forward..\");
Node tmp = head;
while(tmp != null){
System.out.println(tmp.element);
tmp = tmp.getForeNode;
}
}
public Node listSearch(E item){
System.out.println(\"Searching Item \"+item);
Node tmp = head;
while(tmp != null){
System.out.println(tmp.element);
if(tmp.element == item) {
System.out.println(\"Item found \"+item);
return tmp;
}
tmp = tmp.getForeNode;
}
return null;
}
public void iterateBackward(){
System.out.println(\"iterating backword..\");
Node tmp = tail;
while(tmp != null){
System.out.println(tmp.element);
tmp = tmp.getBackNode;
}
}
public E removeFirst() {
if (size == 0) throw new NoSuchElementException();
Node tmp = head;
head = head.getForeNode;
head.getBackNode = null;
size--;
System.out.println(\"deleted: \"+tmp.element);
return tmp.element;
}
public E removeNodeAfter() {
if (size == 0) throw new NoSuchElementException();
Node tmp = tail;
tail = tail.getBackNode;
tail.getForeNode = null;
size--;
System.out.println(\"deleted: \"+tmp.element);
return tmp.element;
}
}.
Reactive clean architecture
Talk on how to think when building Android apps using a reactive Clean Architecture. This talk was held at the Stockholm Android Meetup group April 17 2018 at Developers bay.
Refactoring In Tdd The Missing Part
The document discusses test-driven development (TDD) and refactoring. It provides examples of unit test fixtures, exercising the system under test (SUT), and verifying results. It also discusses refactoring code to remove smells like duplicated code through techniques like extracting methods. The goal is to use TDD to write code that works and is clean through small, incremental changes while ensuring it continues to work by passing all tests.
package singlylinkedlist; public class Node { public String valu.pdf
package singlylinkedlist;
public class Node {
public String value;
public Node next;
public Node(String value) {
this.value = value;
}
@Override
public String toString() {
return value;
}
}
SingleyLinkedList.java :
package singlylinkedlist;
import java.io.*;
import java.util.*;
/**
* Defines the interface for a singly-linked list.
*
*/
public interface SinglyLinkedList {
/**
* @return Reference to the first node. If the list is empty, this method
* returns null.
*/
public Node getFirst();
/**
* @return Reference to the last node . If the list is empty, this method
* returns null.
*/
public Node getLast();
/**
* @return Number of nodes in the list
*/
public int size();
/**
* @return true if the list has no nodes; false otherwise
*/
public boolean isEmpty();
/**
* Removes all nodes in the list.
*/
public void clear();
/**
* Inserts a new node with the given value after cursor.
*
* @param cursor
* The node to insert after. Set this to null to insert value as
the
* new first Node.
* @param value
* The value to insert
* @return a reference to the newly inserted Node
*/
public Node insert(Node cursor, String value);
/**
* Inserts a new node with the given value at the "end" of the list.
*
* @param value
* @return a reference to the newly inserted Node
*/
public Node append(String value);
/**
* Removes the node after the specified Node (cursor) from the list.
*
* @param cursor
* A reference to the Node to remove.
*/
public void removeAfter(Node cursor);
/**
* Returns a reference to the first Node containing the key, starting from
the
* given Node.
*
* @param start
* @param key
* @return a reference to the first Node containing the key
*/
public Node find(Node start, String key);
/**
* Prints the values of all the items in a list
*/
public void printWholeList();
}
SinglyLinkedTester.java:
package sbccunittest;
import static java.lang.Math.*;
import static java.lang.System.*;
import static org.apache.commons.lang3.StringUtils.*;
import static org.junit.Assert.*;
import static sbcc.Core.*;
import java.io.*;
import java.lang.reflect.*;
import java.nio.file.*;
import java.util.*;
import java.util.stream.*;
import org.apache.commons.lang3.*;
import org.junit.*;
import org.w3c.dom.ranges.*;
import sbcc.*;
import singlylinkedlist.*;
/**
* 09/16/2021
*
* @author sstrenn
*
*/
public class SinglyLinkedListTester {
public static String newline = System.getProperty("line.separator");
public static int totalScore = 0;
public static int extraCredit = 0;
public static boolean isZeroScore = false;
public static String scorePreamble = "";
@BeforeClass
public static void beforeTesting() {
totalScore = 0;
extraCredit = 0;
}
@AfterClass
public static void afterTesting() {
if (isZeroScore) {
totalScore = 0;
extraCredit = 0;
}
println(scorePreamble + "Estimated score (w/o late penalties, etc.) is:
" + totalScore + " out of 25.");
// If the project follows the naming convention, save the results in a
folder on
// the desktop. (Alex Kohanim)
try {
String directory =
substri.
Create a class BinarySearchTree- A class that implements the ADT binar.pdf
Create a class BinarySearchTree. A class that implements the ADT binary search tree by
extending BinaryTree. Recursive version.
public class BinarySearchTree<T extends Comparable<? super T>>
extends BinaryTree<T> implements SearchTreeInterface<T>
{
public BinarySearchTree ()
{
super();
} // end default constructor
public BinarySearchTree (T rootEntry)
{
super();
setRootNode(new BinaryNode<>(rootEntry));
} // end constructor
public void setTree (T rootData) // Disable setTree (see Segment 25.6)
{
throw new UnsupportedOperationException();
} // end setTree
public void setTree (T rootData, BinaryTreeInterface<T> leftTree, BinaryTreeInterface<T>
rightTree)
{
throw new UnsupportedOperationException();
} // end setTree
//...
public T remove (T entry)
{
ReturnObject oldEntry = new ReturnObject(null);
BinaryNode<T> newRoot = removeEntry(getRootNode(), entry, oldEntry);
setRootNode(newRoot);
return oldEntry.get();
} // end remove
//...
private class ReturnObject
{
private T item;
private ReturnObject(T entry)
{
item = entry;
} // end constructor
public T get()
{
return item;
} // end get
public void set(T entry)
{
item = entry;
} // end set
} // end ReturnObject
} // end BinarySearchTree
HERE IS BinaryTree.java
import java.util.Iterator;
import java.util.NoSuchElementException;
public class BinaryTree<T> implements BinaryTreeInterface<T> {
private BinaryNode<T> root;
public BinaryTree() {
root = null;
}
public BinaryTree(T rootData) {
root = new BinaryNode<>(rootData);
}
public BinaryTree(T rootData, BinaryTree<T> leftTree, BinaryTree<T> rightTree) {
privateSetTree(rootData, leftTree, rightTree);
}
private void privateSetTree(T rootData, BinaryTree<T> leftTree, BinaryTree<T>
rightTree) {
root = new BinaryNode<>(rootData);
if (leftTree != null && !leftTree.isEmpty()) {
root.setLeftChild(leftTree.root);
}
if (rightTree != null && !rightTree.isEmpty()) {
if (rightTree != leftTree) {
root.setRightChild(rightTree.root);
} else {
root.setRightChild(rightTree.root.copy());
}
}
if (leftTree != null && leftTree != this) {
leftTree.clear();
}
if (rightTree != null && rightTree != this) {
rightTree.clear();
}
}
@Override
public T getRootData() {
if (isEmpty()) {
throw new EmptyTreeException("The tree is empty.");
}
return root.getData();
}
@Override
public int getHeight() {
return root.getHeight();
}
@Override
public int getNumberOfNodes() {
return root.getNumberOfNodes();
}
@Override
public boolean isEmpty() {
return root == null;
}
@Override
public void clear() {
root = null;
}
@Override
public Iterator<T> getPreorderIterator() {
return new PreorderIterator();
}
@Override
public Iterator<T> getInorderIterator() {
return new InorderIterator();
}
@Override
public Iterator<T> getPostorderIterator() {
return new PostorderIterator();
}
private class PreorderIterator implements Iterator<T> {
private StackInterface<BinaryNode<T>> nodeStack;
public PreorderIterator() {
nodeStack = new LinkedStack<>();
if (root != null) {
nodeStack.push(root);
}
}
public boolean hasNex.
Working With JQuery Part1
The document provides information about jQuery:
1) jQuery is an open-source JavaScript library developed by John Resig in 2006 that simplifies HTML document traversal and manipulation, events, animations and Ajax interactions for rapid web development.
2) It is used by many large companies and websites and has two versions: compressed and uncompressed, under both MIT and GPL licenses.
3) The document outlines jQuery's main features including being lightweight, having a large plugin library, easy to learn and use, CSS3 support, documentation and examples. It then provides examples of how to implement jQuery.
I need help implementing a Stack with this java programming assignme.pdf
I need help implementing a Stack with this java programming assignment:
Given a doubly linked list (code provided below) implement a Stack. You must use the doubly
link list class and utilize it as an object in your implementation of the stack.
A Stack is a Last in First Out (LiFO) structure which translates to the processes of outputting the
last element which was inputted in the collection. The Stack is based on the process of putting
things on top of one another and taking the item on top (think of a stack of papers).
Operations to implement:
push (E): Add an element to the start of the sequence
pop: Remove an element from the start of the sequence
Peek: Return the first element of the sequence without removing it
atIndex(x): Return the element at the given index (x) Or throw an exception if it is out of bound
(if you can control the user input then do that instead)
Size: Return the size of the Stack
isEmpty: Boolean, returns true if the Stack is empty
Empty: Empty the Stack
Code Part 1:
public class DoublyLinkedList{
private DNode head;
private DNode tail;
private int size;
public DoublyLinkedList(){ // construct an empty list
this.tail = new DNode (null, null, this.head);
this.head = new DNode (null, this.tail, null);
this.size = 0;
}
public DoublyLinkedList(DNode next){ // constructs a list
// out of a single node
this.tail = new DNode (null, null, next);
this.head = new DNode (null, next, null);
next.changeNext(this.tail);
next.changePrev(this.head);
this.size = 1;
}
public DoublyLinkedList(Object [] objectArray){ // construct a list out of
// an array
this.tail = new DNode (null, null, this.head);
this.head = new DNode (null, this.tail, null);
DNode temp = this.head;
for (Object e : objectArray)
{
//Anonomus function
new DNode (e, temp.getNext(),temp).insertBetweenNodes(temp, temp.getNext());
temp = temp.getNext();
this.size += 1;
}
}
public void addToFrontofList(Object toAdd){ // Appends the begining
// of the list
DNode temp = new DNode (toAdd, this.head.getNext(), this.head);
this.head.getNext().changePrev(temp);
this.head.changeNext(temp);
this.size += 1;
}
public void addToendofList (Object toAdd) // appends the end of the list
// with a node
{
DNode temp = new DNode (toAdd, this.tail, this.tail.getPrev());
this.tail.getPrev().changeNext(temp);
this.tail.changePrev(temp);
this.size += 1;
}
public void insertAfterNode(DNode current, Object input)// Inserts a new
// a new node after
// current node
{
current.insertAfterNode(input);
this.size += 1;
}
public int getSize() // returns the size of the list
{
return this.size;
}
public String toString()
{
String result = \"\";
for (DNode temp = this.head.getNext();
temp.hasNext(); temp = temp.getNext())
{
result += temp.getValue();
result += \" -> \";
}
result += \"End of list\";
return result;
}
}
and code part2:
public class DNode{
private Object e; // place holder for the type of object the
//collection is storing
private DNode next; // reference to the next node in the sequence
// of.
This is a java lab assignment. I have added the first part java re.pdf
This is a java lab assignment. I have added the first part \"java retail class\" at the bottom. I am
unsure how to read the txt file into an array from the retail class. The stock txt file has been
added also.
A beginning framework and inventory list has been provided to you to use your Retail Item Class
as an array. Develop a program to accomplish the following menu items that can be selected by
the end user. Discussion of what each menu item should do is provided below the menu item.
Modify your object class file as desired. Please append initials to files created. Use Select-Case
for menu choices and methods to perform those choices. Please make a selection: 1. Open
Inventory File (This should ask the user for the file name, open the file and load the data into the
object array). 2. Display All (This should show a table of all items and data) 3. Display Reorder
Only (This should show only the stock number, Description and current quantity for items
requiring reorder) 4. Find Stock number (Allows the user to enter part of the description and
displays all matching stock numbers and descriptions matching that - case insensitive, such as
“cubs” or “cubs”) 5. Display Stock number (Allows user to enter stock number and displays
record of item) 6. Add Quantity (Asks for stock number and quantity for units, adds it to current,
displays record results) 7. Subtract Quantity (Asks for stock number and quantity, subtracts,
displays results including if reorder is needed.) 8. Change Price (Asks for stick number, changes
price to provided value, display results). 9. New Item (Allows adding a new item, updates count.
Display record results). 10. Save Inventory File (asks user for file name, save all inventory to
that file in a format that can be read back.)
public class RetailItem{
private String description;
private int unitsOnHand;
private double price;
private int restock;
public void setDescription(String userDescription){
description=userDescription;
}
public void setUnitsOnHand(int userUnitsOnHand){
unitsOnHand=userUnitsOnHand;
}
public void setPrice(double userPrice){
price=userPrice;
}
public String getDescription(){
return description;
}
public int getUnitsOnHand(){
return unitsOnHand;
}
public double getPrice(){
return price;
}
public double getTotal(){
int total = unitsOnHand=(int) price;
return total;
}
public boolean getRestock(){
return false;
}
public RetailItem(String descriptionGiven, int unitsOnHandGiven, double priceGiven, int
restockGiven){
description=descriptionGiven;
unitsOnHand=unitsOnHandGiven;
price=priceGiven;
restock=restockGiven;
}
}
Solution
public class RetailItem{
private int stocknumber;
private String description;
private int unitsOnHand;
private double price;
private int restock;
public void setDescription(String userDescription){
description=userDescription;
}
public int getStocknumber() {
return stocknumber;
}
public void setStocknumber(int stocknumber) {
this.stocknumber = stocknumber;
}
public void setUnitsOnHand(in.
Code error where list index is out of range when doing command like -p.docx
Code error where list index is out of range when doing command like "python3 edfs.py -create /user/file" Trying to follow instruction of python edfs.py -create which will create a file in the specified path. Note the file is empty and your implementation only needs to add the file name to your emulated file system. No need to add data for the file. The command should report an error if the file already exists. Also command "python3 edfs.py -ls /" should list all files under directory but is unable to due to some error that list object has no attribute keys.
Code transcript below, indents not here:
import sys
import json
import requests
import base64
# Firebase URL
firebase_url = "YOUR_FIREBASE_URL"
# Function to get the data from Firebase
def get_firebase_data(url):
response = requests.get(url)
data = json.loads(response.text)
return data
# Function to list all files and directories under a given directory
def list_directory(dir_path):
data = get_firebase_data(firebase_url + dir_path + ".json")
if data is not None:
for key in data.keys():
if key == "content":
print(dir_path + ": " + data[key])
else:
list_directory(dir_path + "/" + key)
# Function to create a new file with the given content
def create_file(file_path, content):
data = {"content": content}
response = requests.put(firebase_url + file_path + ".json", data=json.dumps(data))
# Function to create a new directory
def create_directory(dir_path):
data = {}
response = requests.put(firebase_url + dir_path + ".json", data=json.dumps(data))
# Function to remove a file or directory
def remove(path):
response = requests.delete(firebase_url + path + ".json")
# Function to export the file system structure in XML format
def export_xml():
root_data = get_firebase_data(firebase_url + ".json")
print("<root>")
for key in root_data.keys():
print("<" + key + ">")
export_directory(key)
print("</" + key + ">")
print("</root>")
# Function to export a directory and its contents in XML format
def export_directory(dir_path):
data = get_firebase_data(firebase_url + dir_path + ".json")
if data is not None:
for key in data.keys():
if key == "content":
content = data[key]
print("<file name='" + dir_path + "'>" + base64.b64encode(content.encode('utf-8')).decode('utf-8') + "</file>")
else:
print("<directory name='" + key + "'>")
export_directory(dir_path + "/" + key)
print("</directory>")
# Parse the command-line arguments
args = sys.argv
command = args[1]
path = args[2]
# Execute the appropriate command
if command == "-ls":
list_directory(path)
elif command == "-create":
content = args[3]
create_file(path, content)
elif command == "-mkdir":
create_directory(path)
elif command == "-rmdir" or command == "-rm":
remove(path)
elif command == "-export":
export_xml()
.
Modify this code to change the underlying data structure to .pdf
Modify this code to change the underlying data structure to a double ended doubly-linked list. Data
records should be added to the end of the main array (the database) and three double ended
doubly linked lists should be maintained ; one each for the ID, LastName and FirstName. The
linked lists should (of course) be maintained in order You MUST use the driver program I have
provided , and make some additions. Remember, you should NOT be permitted to add a record
with a duplicate index number. You MUST implement all methods as I have indicated. Printing out
the data in forward order should use the "next" link in each node, printing out in reverse order
should employ the "prev" link.
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class DataBase {
private DataBaseArray dbArr;
private IndexArray firstIA, lastIA, IDIA;
private DeleteStack deleteStack;
private Scanner scan;
private String nld = "n-----------------------------n";
private String dnl = "-----------------------------n";
//Default Constructor
public DataBase() {
this.dbArr = new DataBaseArray(100);
this.firstIA = new IndexArray(100, false);
this.lastIA = new IndexArray(100, false);
this.IDIA = new IndexArray(100, true);
this.deleteStack = new DeleteStack(100);
readInDataFromFile();
scan = new Scanner(System.in);
}
//Constructor for custom size
public DataBase(int maxSize) {
this.dbArr = new DataBaseArray(maxSize);
this.firstIA = new IndexArray(maxSize, false);
this.lastIA = new IndexArray(maxSize, false);
this.IDIA = new IndexArray(maxSize, true);
this.deleteStack = new DeleteStack(maxSize);
readInDataFromFile();
scan = new Scanner(System.in);
}
//Read in the initial records
public void readInDataFromFile() {
File dbData = new File("dbData.txt");
Scanner scan = new Scanner(System.in); //Have to initialize to something for compilation
try {
scan = new Scanner(dbData);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
String ID = "";
String fname = "";
String lname = "";
String[] values;
while(scan.hasNextLine()) {
values = scan.nextLine().split(",");
lname = values[0];
fname = values[1];
ID = values[2];
this.insertIt(ID, fname, lname);
}
}
//Ask user to specify ID, delete that record
public void deleteIt() {
String ID = "";
System.out.println("nDELETING" + nld);
System.out.println("Please enter the ID of the record to be deleted: ");
ID = this.scan.nextLine();
if (this.IDIA.searchByKey(ID) == -1) {
System.out.println(dnl + "Record not found, please try again." + nld);
return;
}
this.delete(ID);
System.out.println(dnl + "Record successfully deleted" + nld);
}
//Ask user to specify ID, return data of that record
public void findIt() {
String ID = "";
System.out.println("nFINDING" + nld);
System.out.println("Please enter the ID of the record to be found: ");
ID = this.scan.nextLine();
int iaIndexOfRecord = this.IDIA.searchByKey(ID);
if (iaIndexOfRecord == -1) {
System.out.println(dnl + "Record not found, please try again." + nld);
return.
Here is the editable codeSolutionimport java.util.NoSuchEleme.pdf
Here is the editable code:
Solution
import java.util.NoSuchElementException;
public class DoublyLinkedListImpl {
private Node head;
private Node tail;
private int size;
public DoublyLinkedListImpl() {
size = 0;
}
private class Node {
E element;
Node next;
Node prev;
public Node(E element, Node next, Node prev) {
this.element = element;
this.next = next;
this.prev = prev;
}
}
public int size() { return size; }
public boolean isEmpty() { return size == 0; }
public void addFirst(E element) {
Node tmp = new Node(element, head, null);
if(head != null ) {head.prev = tmp;}
head = tmp;
if(tail == null) { tail = tmp;}
size++;
System.out.println(\"adding: \"+element);
}
/**
* adds element at the end of the linked list
* @param element
*/
public void addLast(E element) {
Node tmp = new Node(element, null, tail);
if(tail != null) {tail.next = tmp;}
tail = tmp;
if(head == null) { head = tmp;}
size++;
System.out.println(\"adding: \"+element);
}
public void iterateForward(){
System.out.println(\"iterating forward..\");
Node tmp = head;
while(tmp != null){
System.out.println(tmp.element);
tmp = tmp.next;
}
}
/**
* this method walks backward through the linked list
*/
public void iterateBackward(){
System.out.println(\"iterating backword..\");
Node tmp = tail;
while(tmp != null){
System.out.println(tmp.element);
tmp = tmp.prev;
}
}
public E removeFirst() {
if (size == 0) throw new NoSuchElementException();
Node tmp = head;
head = head.next;
head.prev = null;
size--;
System.out.println(\"deleted: \"+tmp.element);
return tmp.element;
}
public E removeLast() {
if (size == 0) throw new NoSuchElementException();
Node tmp = tail;
tail = tail.prev;
tail.next = null;
size--;
System.out.println(\"deleted: \"+tmp.element);
return tmp.element;
}
public static void main(String a[]){
DoublyLinkedListImpl dll = new DoublyLinkedListImpl();
dll.addFirst(10);
dll.addFirst(34);
dll.addLast(56);
dll.addLast(364);
dll.iterateForward();
dll.removeFirst();
dll.removeLast();
dll.iterateBackward();
}
}
import java.util.Scanner;
/* Class Node */
class Node
{
protected int data;
protected Node next, prev;
/* Constructor */
public Node()
{
next = null;
prev = null;
data = 0;
}
/* Constructor */
public Node(int d, Node n, Node p)
{
data = d;
next = n;
prev = p;
}
/* Function to set link to next node */
public void setLinkNext(Node n)
{
next = n;
}
/* Function to set link to previous node */
public void setLinkPrev(Node p)
{
prev = p;
}
/* Funtion to get link to next node */
public Node getLinkNext()
{
return next;
}
/* Function to get link to previous node */
public Node getLinkPrev()
{
return prev;
}
/* Function to set data to node */
public void setData(int d)
{
data = d;
}
/* Function to get data from node */
public int getData()
{
return data;
}
}
/* Class linkedList */
class linkedList
{
protected Node start;
protected Node end ;
public int size;
/* Constructor */
public linkedList()
{
start = null;
end = null;
size = 0;
}
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Step 1 The Pair Class Many times in writing software we come across p.pdf
Step 1 The Pair Class Many times in writing software we come across problems that require us
of values. For to store a pair example, a coordinate system would require an x, y value pair or a
hash key value pair Your task on this assignment is table as a data, one type but to create a
simple template pair class called Pair that has two type parameters. You should call these
parameters F and s. Functionality Constructor You should create a working constructor that takes
two type parameters one for each of the pair values. get First This is an accessor method that will
return the first of the pair values. get second This is an accessor method that will return the
second of the pair values. set First This is a mutator method that will set the first pair value
setsecond This is a mutator method that will set the second pair value
Solution
Pair.java
public class Pair {
private F first; //first member of pair
private S second; //second member of pair
public Pair(F first, S second) {
this.first = first;
this.second = second;
}
public void setFirst(F first) {
this.first = first;
}
public void setSecond(S second) {
this.second = second;
}
public F getFirst() {
return first;
}
public S getSecond() {
return second;
}
}
LinkedList.java
template class Node
{
private T data; //the object information
private Node* next; //pointer to the next node element
public void setData(T val)
{
this.data = val;
}
public void setNextNull()
{
this.next = NULL;
}
public void setNext(Node *tmp)
{
this.next = tmp;
}
public Node* getNext()
{
return this.next;
}
};
template class LinkedList extends Node
{
private Node *head = new Node;
private Node *tail = new Node;
public LinkedList()
{
head = NULL;
tail = NULL;
}
public ~LinkedList()
{
}
//Method adds info to the end of the list
public void append(T info)
{
if(head == NULL) //if our list is currently empty
{
head = new Node; //Create new node of type T
head->setData(info);
tail = head;
}
else //if not empty add to the end and move the tail
{
Node* temp = new Node;
temp->setData(info);
temp->setNextNull();
tail->setNext(temp);
tail = tail->getNext();
}
}
public void addFront(T info)
{
if(head == NULL) //if our list is currently empty
{
head = new Node; //Create new node of type T
head->setData(info);
tail = head;
}
else //if not empty add to the end and move the tail
{
Node* temp = new Node;
temp->setData(info);
temp->setNext(head);
head = temp;
}
}
//insert after given node
public void insert(Node *node,T info)
{
Node *temp = new Node;
temp->setData(info);
temp->setNext(node->getNext());
node->setNext(temp);
}
public void delete(Node *node)
{
Node *temp = new Node;
temp = head;
while(temp->getNext() != node && temp->getNext() )
{
temp = temp->getNext();
}
if(temp)
{
temp->setNext(node->getNext());
delete node;
}
}
public Integer size(Node *head)
{
int sz=0;
Node * temp = new Node;
temp = head;
while(temp)
{
sz++;
temp = temp->getNext();
}
return sz;
}
}
PairList.java
public class PairList< E, F > extends LinkedList< Pair< E,.
How do I fix it in LinkedList.javaLabProgram.javaLinkedList.jav.pdf
How do I fix it in LinkedList.java?
LabProgram.java
LinkedList.java:
/**
* Defines a doubly-linked list class
* @author
* @author
*/
import java.util.NoSuchElementException;
public class LinkedList {
private class Node {
private T data;
private Node next;
private Node prev;
public Node(T data) {
this.data = data;
this.next = null;
this.prev = null;
}
}
private int length;
private Node first;
private Node last;
private Node iterator;
/**** CONSTRUCTORS ****/
/**
* Instantiates a new LinkedList with default values
* @postcondition
*/
public LinkedList() {
first = null;
last = null;
iterator = null;
length = 0;
}
/**
* Converts the given array into a LinkedList
* @param array the array of values to insert into this LinkedList
* @postcondition
*/
public LinkedList(T[] array) {
}
/**
* Instantiates a new LinkedList by copying another List
* @param original the LinkedList to copy
* @postcondition a new List object, which is an identical,
* but separate, copy of the LinkedList original
*/
public LinkedList(LinkedList original) {
}
/**** ACCESSORS ****/
public T getFirst() throws NoSuchElementException {
if (isEmpty()){
throw new NoSuchElementException("The list is empty");
}
return first.data;
}
public T getLast() throws NoSuchElementException {
if (isEmpty()){
throw new NoSuchElementException("The list is empty");
}
return last.data;
}
/**
* Returns the data stored in the iterator node
* @precondition
* @return the data stored in the iterator node
* @throw NullPointerException
*/
public T getIterator() throws NullPointerException {
if (iterator != null){
return iterator.data;
}else{
throw new NullPointerException("Iterator is off the end opf the list.");
}
}
/**
* Returns the current length of the LinkedList
* @return the length of the LinkedList from 0 to n
*/
public int getLength() {
return length;
}
/**
* Returns whether the LinkedList is currently empty
* @return whether the LinkedList is empty
*/
public boolean isEmpty() {
return length == 0;
}
/**
* Returns whether the iterator is offEnd, i.e. null
* @return whether the iterator is null
*/
public boolean offEnd() {
return iterator == null;
}
/**** MUTATORS ****/
public void addFirst(T data) {
Node newNode = new Node(data);
if(isEmpty()){
first = newNode;
last = newNode;
}
else{
newNode.next = first;
first.prev = newNode;
first = newNode;
}
length++;
}
public void addLast(T data) {
Node newNode = new Node(data);
if(isEmpty()){
first = newNode;
last = newNode;
}
else{
last.next = newNode;
newNode.prev = last;
last = newNode;
}
length++;
}
/**
* Inserts a new element after the iterator
* @param data the data to insert
* @precondition
* @throws NullPointerException
*/
public void addIterator(T data) throws NullPointerException{
if(iterator != null){
Node newNode = new Node(data);
newNode.next = iterator.next;
iterator.next = newNode;
if (iterator == first){
first = newNode;
}
}else{
throw new NullPointerException("Iterator is off the end opf the list.");
}
}
/
public void removeFirst() throws NoS.
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Kamil Chmielewski, Jacek Juraszek - "Hadoop. W poszukiwaniu złotego młotka."
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