a. Write a class called hyprid that uses linked lists to represent a queue and stack. As you can recall that the only difference in between the stack and the queue is that the stack uses the addHead method to push items and the queue uses the addTail method to insert items. The class should be implemented using LinkedLists. The class should contain the following methods: a. boolean empty() to check if the underlying list is empty b. void push(int item) to add the item using addFirst c. void insert (int item) to add the item using addLast d. int remove() to remove an item from the beginning of the list e. int pop() the same as above but with name changed
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- Write a Java program which stores three values by using singly linked list.- Node class1. stuID, stuName, stuScore, //data fields2. constructor3. update and accessor methods- Singly linked list class which must has following methods:1. head, tail, size// data fields2. constructor3. update and accessor methodsa. getSize() //Returns the number of elements in the list.b. isEmpty( ) //Returns true if the list is empty, and false otherwise.c. getFirstStuID( ), getStuName( ), getFirstStuScore( )d. addFirst(stuID, stuName, stuScore)e. addLast(stuID, stuName, stuScore)f. removeFirst ( ) //Removes and returns the first element of the list.g. displayList( ) //Displays all elements of the list by traversing the linked list.- Test class – initialize a singly linked list instance. Test all methods of singly linked list classImplement a simple linked list in Python (Write source code and show output) with basic linked list operations like: (a) create a sequence of nodes and construct a linear linked list. (b) insert a new node in the linked list. (b) delete a particular node in the linked list. (c) modify the linear linked list into a circular linked list. Use this template: class Node:def __init__(self, val=None):self.val = valself.next = Noneclass LinkedList:"""TODO: Remove the "pass" statements and implement each methodAdd any methods if necessaryDON'T use a builtin list to keep all your nodes."""def __init__(self):self.head = None # The head of your list, don't change its name. It shouldbe "None" when the list is empty.def append(self, num): # append num to the tail of the listpassdef insert(self, index, num): # insert num into the given indexpassdef delete(self, index): # remove the node at the given index and return the deleted value as an integerpassdef circularize(self): # Make your list circular.…Write a Java program which stores three values by using doubly linked list.- Node class4. stuID, stuName, stuScore, //data fields5. constructor6. update and accessor methods- Singly linked list class which must has following methods:4. head, tail, size// data fields5. constructor6. update and accessor methodsa. getSize() //Returns the number of elements in the list.b. isEmpty( ) //Returns true if the list is empty, and false otherwise.c. getFirstStuID( ), getStuName( ), getFirstStuScore( )d. addFirst (stuID, stuName, stuScore)e. addLast(stuID, stuName, stuScore)f. removeFirst( ) //Removes and returns the first element of the list.g. removeLast( ) //Removes and returns the first element of the list.h. displayList( ) //Displays all elements of the list by traversing the linked list.- Test class – initialize a doubly linked list instance. Test all methods of doubly linked list class.
- A) Write a generic Java queue class (a plain queue, not a priority queue). Then, call it GenericQueue, because the JDK already has an interface called Queue. This class must be able to create a queue of objects of any reference type. Consider the GenericStack class shown below for some hints. Like the Stack class below, the GenericQueue should use an underlying ArrayList<E>. Write these methods and any others you find useful: enqueue() adds an E to the queue peek() returns a reference to the object that has been in the queue the longest, without removing it from the queue dequeue() returns the E that has been in the queue the longest, and removes it from the queue contains(T t) returns true if the queue contains at least one object that is equal to t *in the sense that calling .equals() on the object with t the parameter returns true.* Otherwise contains returns false. size() and isEmpty() are obvious.in java 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.in regards to java For this problem, I have a complete linked list program which supports the following commands from the user: insert, display, delete, average, find, insertBefore, insertAfter. insert allows them to insert a number into the current list, display will display the numbers in the current list etc. The program is complete except that I have removed the body of the method for find. Given the following class for the nodes in a linked list: public class Node { ... public Node getNext() {...} // return next field public int getData() {...} // returns data } Assuming that the variable head points to (i.e. contains the address of) the first node of a linked list, write the statements to find the first occurrence of the data value x in the linked list. For example, find(4) would return something like "Found at node position 20" or "Not found" Assume that the nodes in the linked list are counted starting from 1. Your statements will be inserted inside a method like the…
- 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 6Java Only Do Method, I will give LinkedList Implementation Write a method checkForEquality to be included in class KWLinkedList that does not have any parameter. Assume the list is having even number of nodes. The method returns true if the first half of the list is equal to the second half of the list in the reverse order, otherwise it returns false. If the list is empty, the method returns false; import java.util.NoSuchElementException;/** Implementation of the interface StackInt using a linked list. The* top element of the stack is in the first (front) node of the linked list.*/public class LinkedStack<E> implements StackInt<E>{ /** Node: inner class to create nodes for linked list based stack. */private static class Node<E>{// Data Fieldsprivate E data;private Node<E> next; // The reference to the next node. // Constructors/*** Creates a new node with a null next field.* @param dataItem The data to be stored in the node*/private Node(E dataItem){data =…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…
- Consider the implementation of the Ordered Linked list class, implement the following functions as part of the class definition: ▪ index(item) returns the position of item in the list. It needs the item and returns the index. Assume the item is in the list. ▪ pop() removes and returns the last item in the list. It needs nothing and returns an item. Assume the list has at least one item. ▪ pop_pos(pos) removes and returns the item at position pos. It needs the position and returns the item. Assume the item is in the list. ▪ a function that counts the number of times an item occurs in the linked list ▪ a function that would delete the replicate items in the linked list (i.e. leave one occurrence only of each item in the linked list) Your main function should do the following: ▪ Generate 15 random integer numbers in the range from 1 to 5.▪ Insert each number (Item in a node) in the appropriate position in a linked list, so you will have a sorted linked list in ascending order.▪…c)Define a class that implementsa singly linked list with the following methods, assuming that the first node of a linked list is referred to by head:i) A constructor.ii) searchNode that takes asparameter an integer value and returns a reference to the node with that value if it is found,and null otherwise. i)addlnOrder that allows insertion of a node to the linked list such that the list remainssorted in ascendingorder.iv) displayList which displays all the nodes in the linked list.d) Assuming that the class defined in part (c) aboveis used to implement a queueofpositive integers, define the following methods which can be used to implement queueoperations:i) isEmptythat returns true if the queue is empty andfalse otherwise.ii) pop that returns the value of the first node if the linked list is not empty,and -1 otherwise.iii) push that takes as parameteran integer value and adds it to the end of the queue.Given the MileageTrackerNode class, complete main() in the MileageTrackerLinkedList class to insert nodes into a linked list (using the insertAfter() method). The first user-input value is the number of nodes in the linked list. Use the printNodeData() method to print the entire linked list. DO NOT print the dummy head node. Ex. If the input is: 3 2.2 7/2/18 3.2 7/7/18 4.5 7/16/18 the output is: 2.2, 7/2/18 3.2, 7/7/18 4.5, 7/16/18 public class MileageTrackerNode { private double miles; // Node data private String date; // Node data private MileageTrackerNode nextNodeRef; // Reference to the next node public MileageTrackerNode() { miles = 0.0; date = ""; nextNodeRef = null; } // Constructor public MileageTrackerNode(double milesInit, String dateInit) { this.miles =…