Write a method that takes as input a singly linked list and prints the first duplicate number. public void printDuplicate (Node head) { //to do OR def printDuplicate (head) : pass
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- QUESTION 9 Write a complete Java program to implement a QUEUE in a bank using LinkedList class as follows: • Provide the menu as shown below; use an infinite loop; stop when user opts 4. 1. Add a customer 2. Remove a customer 3. Show the queue 4. Exit • Add a customer should add an int number at the end of queue using the method addLast(). • Remove a customer should delete the int from front using the method removeFirst(). Show the queue should display the numbers in queue using the method System.out.printIn(). For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).implement this method: numOccurrencesRec(LNode node, int n, int key) – This method takes as parameters a reference to the head of a linked list, a position specified by n, and a key. It returns the number of occurrences of the key in the linked list beginning at the n-th node. If n = 0, it means you should search in the entire linked list. If n = 1, then you should skip the first node in the list.JAVA please Given main() in the ShoppingList class, define an insertAtEnd() method in the ItemNode class that adds an element to the end of a linked list. DO NOT print the dummy head node. Ex. if the input is: 4 Kale Lettuce Carrots Peanuts where 4 is the number of items to be inserted; Kale, Lettuce, Carrots, Peanuts are the names of the items to be added at the end of the list. The output is: Kale Lettuce Carrots Peanuts Code provided in the assignment ItemNode.java:
- Implement a class “LinkedList” which has two private data members head: A pointer to the Node class length: length of the linked listImplement the following private method: 1. bool InsertHead(int data); // Use InsertAt FunctionInsert at the start of the linked list. Return true2. bool InsertEnd(int data); // Use InsertAt FunctionInsert at the end of the linked list. Return true3. bool RemoveAt(int index);Remove and delete the node at position “index”. Return true if successful, otherwise, false. this in c++8. Write down the insertBefore method which inserts a new element in the list before the node containing the given element. The method takes as parameters a dummy headed doubly linked circular list, the element existing in the list and new element to be added. public void insertBefore (Node head, Object elem, Object newElement) { //to do OR def insertBefore (head, elem, newElement): pass insertBefore (head, 3, 50) Sample Input Sample Output Ox21 2 223 240 O x21 2 22 50 ² 3 2 4 0Complete this missing methods using Java: public boolean contains(int value) Write a method contains that accepts a value and returns true if the value exists in the linked list, otherwise it returns false 2. public void set(int index, int value) Write a method set that accepts an index and a value and sets the list's element at that index to have the given value. You may assume that the index is between 0 (inclusive) and the size of the list (exclusive). 3.public boolean isSorted() Write a method isSorted that returns true if the list is in sorted (nondecreasing) order and returns false otherwise. An empty list is considered to be sorted. 4. public int deleteBack() Write a method deleteBack that deletes the last value (the value at the back of the list) and returns the deleted value. If the list is empty, your method should throw a…
- Java Given main() in the ShoppingList class, define an insertAtEnd() method in the ItemNode class that adds an element to the end of a linked list. DO NOT print the dummy head node. Ex. if the input is: 4 Kale Lettuce Carrots Peanuts where 4 is the number of items to be inserted; Kale, Lettuce, Carrots, Peanuts are the names of the items to be added at the end of the list. The output is: Kale Lettuce Carrots Peanuts Second image is ItemNodeJava Design and draw a method called check() to check if characters in a linked list is a palindrome or not e.g "mom" or "radar" or "racecar. spaces are ignored, we can call the spaces the “separator”. The method should receive the separator as a variable which should be equal to “null” when no separator is used.C. package Final; import java.util.HashSet; public class LLCycle_FE { public static void main(String[] args) { Node head = buildLL(); // Given the above linked list write the 2 methods below (removeDuplicates and showLL) System.out.printf("\n --------- "); // This method will remove any duplicate LL nodes (that is, with the same color) head = removeDuplicates( head ); showLL( head ); } **public static Node removeDuplicates(Node head) { return head; } ** private static void showLL(Node head) { // ToDo: Output the entire linked list } private static Node buildLL() { // Use this code to create your LL Node head = new Node("Red", null); Node n2 = new Node("Blue", null); head.next = n2; Node n3 = new Node("Green", null); n2.next = n3; Node n4 = new Node("Yellow", null); n3.next = n4; Node n5 = new…
- Implement a Doubly linked list to store a set of Integer numbers (no duplicate) • Instance variable• Constructor• Accessor and Update methods2. Define DLinkedList Classa. Instance Variables: # Node header # Node trailer # int sizeb. Constructorc. Methods # int getSize() //Return the number of nodes of the list. # int getSize() //Return the number of elements of the list. # boolean isEmpty() //Return true if the list is empty, and false otherwise. # E getFirst() //Return the value of the first node of the list. # E getLast()/ /Return the value of the Last node of the list. # addFirst(E e) //Add a new node to the front of the list. # addLast(E e) //Add a new node to the end of the list. # Node remove(Node n) //remove a node which has the reference n from the list # Node removeFirst() //Remove the first node of the list, and return the removed node or null if failed. # Node removeLast() //Remove the last node of the list, and return the…The implementation of a queue in an array, as given in this chapter, uses the variable count to determine whether the queue is empty or full. You can also use the variable count to return the number of elements in the queue. On the other hand, class linkedQueueType does not use such a variable to keep track of the number of elements in the queue. Redefine the class linkedQueueType by adding the variable count to keep track of the number of elements in the queue. Modify the definitions of the functions addQueue and deleteQueue as necessary. Add the function queueCount to return the number of elements in the queue. Also, write a program to test various operations of the class you defined.In Java, a linked list always terminates with a node that is null. True O False