Implement a Doubly linked list to store a set of Integer numbers (no duplicate) • Instance variable • Constructor • Accessor and Update methods 3. Define TestDLinkedList Class a. Declare an instance of Doubly List class. b. Test all the methods of Doubly List class.
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• Instance variable
• Constructor
• Accessor and Update methods
a. Declare an instance of Doubly List class.
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- JAVA CODE Learning Objectives: Detailed understanding of the linked list and its implementation. Practice with inorder sorting. Practice with use of Java exceptions. Practice use of generics. You have been provided with java code for SomeList<T> class. This code is for a general linked list implementation where the elements are not ordered. For this assignment you will modify the code provided to create a SortedList<T> class that will maintain elements in a linked list in ascending order and allow the removal of objects from both the front and back. You will be required to add methods for inserting an object in order (InsertInorder) and removing an object from the front or back. You will write a test program, ListTest, that inserts 25 random integers, between 0 and 100, into the linked list resulting in an in-order list. Your code to remove an object must include the exception NoSuchElementException. Demonstrate your code by displaying the ordered linked list and…1. Create a doubly-linked list of string and add the following methods Add at the head b. Add at the tail Remove from head 4. Remove from tailC++ programming design a class to implement a sorted circular linked list. The usual operations on a circular list are:Initialize the list (to an empty state). Determine if the list is empty. Destroy the list. Print the list. Find the length of the list. Search the list for a given item. Insert an item in the list. Delete an item from the list. Copy the list. Write the definitions of the class circularLinkedList and its member functions (You may assume that the elements of the circular linked list are in ascending order). Also, write a program to test the operations of your circularLinkedList class. NOTE: The nodes for your list can be defined in either a struct or class. Each node shall store int values.Question 2: Linked List Implementation You are going to create and implement a new Linked List class. The Java Class name is "StringLinkedList". The Linked List class only stores 'string' data type. You should not change the name of your Java Class. Your program has to implement the following methods for the StringLinked List Class: 1. push(String e) - adds a string to the beginning of the list (discussed in class) 2. printList() prints the linked list starting from the head (discussed in class) 3. deleteAfter(String e) - deletes the string present after the given string input 'e'. 4. updateToLower() - changes the stored string values in the list to lowercase. 5. concatStr(int p1, int p2) - Retrieves the two strings at given node positions p1 and p2. The retrieved strings are joined as a single string. This new string is then pushed to the list using push() method.java program java method: 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 6PYTHON LAB: Inserting an integer in descending order (doubly-linked list) Given main.py and an IntNode class, complete the IntList class (a linked list of IntNodes) by writing the insert_in_descending_order() method to insert new IntNodes into the IntList in descending order. Ex. If the input is: 3 4 2 5 1 6 7 9 8 the output is: 9 8 7 6 5 4 3 2 1 _____________________________________________________________________________________ Main.py: from IntNode import IntNode from IntList import IntList if __name__ == "__main__": int_list = IntList() input_line = input() input_strings = input_line.split(' ') for num_string in input_strings: # Convert from string to integer num = int(num_string) # Insert into linked list in descending order new_node = IntNode(num) int_list.insert_in_descending_order(new_node) int_list.print_int_list() IntNode.py class IntNode: def __init__(self, initial_data, next = None,…LAB: Finding an integer in a list (singly-linked list) Given main() and an IntNode class, complete the IntList class by writing the append() and search() methods. The search() method should return the IntNode whose data value matches a given key, and null if the key is not found. The search() method should also set the position of each IntNode searched in the IntList, starting with 1. Ex: If the input is: 12 23 59 37 923 2 -1 12 the output is: 12 found in list at position 1. If the input is: 12 23 59 37 923 2 -1 68 the output is: 68 not found in list. ______________________________________ import java.util.Scanner; public class SearchList {public static void main (String[] args) {Scanner scnr = new Scanner(System.in);IntList intList = new IntList();IntNode curNode, foundNode;int num, searchNum;num = scnr.nextInt();while (num != -1) {// Insert into linked listcurNode = new IntNode(num);intList.append(curNode);num = scnr.nextInt();}searchNum = scnr.nextInt();foundNode =…Lab 17 Using a linked list with an iterator Build a class called LinkedListRunner with a main method that instantiates a LinkedList. Add the following strings to the linked list: aaa bbb cc ddd eee fff ggg hhh iii Build a ListIterator and use it to walk sequentially through the linked list using hasNext and next, printing each string that is encountered. When you have printed all the strings in the list, use the hasPrevious and previous methods to walk backwards through the list. Along the way, examine each string and remove all the strings that begin with a vowel. When you arrive at the beginning of the list, use hasNext and next to go forward again, printing out each string that remains in the linked list.Create an implementation of a doubly linked DoubleOrderedList class. You will need to create a DoubleNode class, a DoubleList class, and a DoubleIterator classLab 17 Using a linked list with an iterator Build a class called LinkedListRunner with a main method that instantiates a LinkedList. Add the following strings to the linked list: aaa bbb ddd еее fff ggg hhh ii Build a ListIterator and use it to walk sequentially through the linked list using hasNext and next, printing each string that is encountered. When you have printed all the strings in the list, use the hasPrevious and previous methods to walk backwards through the list. Along the way, examine each string and remove all the strings that begin with a vowel. When you arrive at the beginning of the list, use hasNext and next to go forward again, printing out each string that remains in the linked list.Problem Description: Q1) Write a method public static void downsize (LinkedList employeeNames, int n) that removes every nth employee from a linked list. Q2) Write a method public static void reverse (LinkedList strings) that reverses the entries in a linked list.Question No: 01:Make a class to implement linked list and Implement the basic functions of Linked list.Constructors(default, parameterized, copy) & destructor• void PrinList(),int search_Element(int x), void Insert_Element(int x), voidInsert_Element_at(int x, int pos), bool Delete_Element(int x), bool is_Empty, intLength(), void Print_Reverse_List(), void Empty_List(), void Copy_List(...)• Also write a driver (main) program to test your code (provide menu for all operations)SEE MORE QUESTIONS