Add a method, printEvenNodes, to the SinglyLinkedList class that prints all integers stored in the nodes at even positions (i.e., the second node, the fourth node, etc.) of the list. Special case: if the list is empty or there is one node in the list, an error message is printed.
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- Add a method swapTwoNodes to SinglyLinkedList class from week 2 lecture examples. This method should swap two nodes node1 and node2 (and not just their contents) given references only to node1 and node2. The new method should check if node1 and node2 are the same node, etc. Write the main method to test the swapTwoNodes method. Hint: You may need to traverse the list. Please give me the full code and share how it works thank you! I need java code, not C ++ or C#.Write a method replace to be included in the class KWLinkedList (for doubly linked list) that accepts two parameters, searchItem and repItem of type E. The method searches for searchItem in the doubly linked list, if found then replace it with repItem and return true. If the searchItem is not found in the doubly linked list, then insert repItem at the end of the linked list and return false. Assume that the list is not empty. You can use ListIterator and its methods to search the searchItem in the list and replace it with repItem if found. Do not call any method of class KWLinkedList to add a new node at the end of the list. Method Heading: public boolean replace(E searchItem, E repItem) Example: searchItem: 15 repItem: 17 List (before method call): 9 10 15 20 4 5 6 List (after method call) : 9 10 17 20 4 5 6Create a nested class called DoubleNode that allows you to create doubly-linked lists with each node containing a reference to the item before it and the item after it (or null if neither of those items exist). Then implement static methods for the following operations: insert before a given node, insert after a given node, remove a given node, remove from a given node, insert at the beginning, insert at the end, remove from a given node, and remove a given node.
- Implement a member method for the List ADT called removeDuplicates(). The method removes every duplicate from the list such that there is only ONE copy of each element in the list. The method also returns the number of copies it removed. For example, if L = {Joe, Bob, Joe, Ned, Bob, Ron, Ron}, a call to L.removeDuplicates modifies the list such that L = {Joe, Bob, Ned, Ron} and returns 3. import java.util.Iterator;import java.util.NoSuchElementException; public class Mock1ListWrapper { public static interface List<E> extends Iterable<E> { public int size(); public boolean isEmpty(); public boolean isMember(E e); public int firstIndexOf(E e); public int lastIndexOf(E e); public void add(E e); public void add(E e, int position); public E get(int position); public E remove(int position); public E replace(int position, E newElement); public void clear(); public Object[] toArray(); public int removeDuplicates(); } @SuppressWarnings("unchecked") public static…Write a method for the Linked Based List class which returns the largest item in the list. If the list is empty return null. Assume that class T is Comparable.DO NOT USE ANY OTHER METHODS OF THE LINKED BASED LIST CLASS. What is the worst case and best case complexity of the code in the previous problem? Explain your answer.implemented The Peek method by calling the Item method with theindex variable as the argument. The Clear method simply calls an identicalmethod in the ArrayList class. The Count property is written as a read-onlyproperty since we don’t want to accidentally change the number of items onthe stack
- Write a method called changeQueue to be considered inside the ArrayQueue class and has one parameter item of type E. Your method will change the queue in such a way that if the the first element of the queue and the last element of the queue are equal, the first and last elements in the queue will be replaced with item, otherwise, do not do any change. Similarly, the same process is done for the second element in the queue and the element before the last in the queue and so on. Assume you have a non-empty queue with even number of elements. You are not allowed to call any method from the the ArrayQueue. class. Do not use iterators. Method head: public void changeQueue(E item) Examplet: Before run: front rear "this" queue: 10 29 2 25 10 Item1: 100 After run: front rear "this" queue: 100 29 100 100 5 100 Use the editor to format your answerWrite a method called changeQueue to be considered inside the ArrayQueue class and has one parameter item of type E. Your method will change the queue in such a way that if the the first element of the queue and the last element of the queue are equal, the first and last elements in the queue will be replaced with item, otherwise, do not do any change. Similarly, the same process is done for the second element in the queue and the element before the last in the queue and so on. Assume you have a non-empty queue with even number of elements. You are not allowed to call any method from the the ArrayQueue class. Do not use iterators. Method head: public void changeQueue(E item) Example1: Before run: front rear "this" queue: 10 29 2 2 5 10 Item1: 100 After run: front rear "this" queue: 100 29 100 100 5 100Consider Bag, SinglyLinkedList, and DoublyLinkedLists classes for integers. Implement and test the following methods: 1. Write a method in Bag class for integers that finds the number of odd and even numbers in the list. 5. Write a method in DoublyLinkedList class that swaps the first and last nodes in the list. 6. Write a Main class to test all these methods.
- Suppose that a list contains Comparable objects. Implement a method that returns a new list of items that are less than some given item. The header of the method could be as follows: public LListgetAllLess Than( Comparable anObject) Write an implementation of this method for the class LList. Make sure that your method does not affect the state of the original list.Trying this again since part of my question keeps disappearing 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 public class ItemNode { private String item; private ItemNode nextNodeRef; // Reference to the next node public ItemNode() { item = ""; nextNodeRef = null; } // Constructor public ItemNode(String itemInit) { this.item = itemInit; this.nextNodeRef = null; } // Constructor…Design and implement a getLastHalf() method for the MyLinkedList class. The method should return the last half of the list as a new list leaving the original list intact. If the list has an uneven number of elements the extra one element must be in the list returned. Example : [1,3,5,4] return [5,4] and [1,6,9] return [6,9]. Follow the three step method for designing the method Develop the java code for the method Create a test program to test the method thoroughly using the Integer wrapper class.