Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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2. Implement a Reference-Based of the ADT Queue and verify ""isEmpty()", "enqueue()", "dequeue()", "dequeueAll()", and "peak()" operations.
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- Define the abstract base class LinkedSQD_Base using a linked implementation. Indicate whether each field and method should be public, protected, or private, and explain why. Implement each of the ADTs stack, queue, and deque as a class that extends your base class. Repeat parts a and b, but instead define and use the abstract base class ArraySQD_Base using an array-based implementation. Java programarrow_forwardUse a SinglyLinked List to implement a Queuea. Define a Queue interface.b. Define a LinkedQueue class (Node class)..c. Define a Test class to test all methods help me make a test class first code package LinkedQueue; import linkedstack.Node; public class SLinkedList<E> { private Node <E> head = null; private Node <E> tail = null; private int size = 0; public SLinkedList() { head = null; tail = null; size = 0; } public int getSize() { return size; } public boolean isEmpty() { return size == 0; } public E getFirst() { if(isEmpty()) { return null; } return head.getElement(); } public E getLast() { if(isEmpty()) { return null; } return tail.getElement(); } public void addFirst(E e) { Node<E> newest = new Node<>(e, null); newest.setNext(head); head = newest; if(getSize()==0) { tail = head; } size++; } public void addLast(E e) { Node<E> newest = new Node<>(e, null); if(isEmpty()) { head = newest; } else {…arrow_forwardDescribe the meaning of the essential methods add(x), deleteMin(), and size() that are supported by the priority queue interface.Implement those methods using a singly-linked list. Analyze the running time of the add(x) and deletMin() operations based on this implementationarrow_forward
- 29The Java interface construct is used to create a formal specification of our Queue ADT. T OR Farrow_forwardDraw a UML class diagram for the following code: import java.util.*; public class QueueOperationsDemo { public static void main(String[] args) { Queue<String> linkedListQueue = new LinkedList<>(); linkedListQueue.add("Apple"); linkedListQueue.add("Banana"); linkedListQueue.add("Cherry"); System.out.println("Is linkedListQueue empty? " + linkedListQueue.isEmpty()); System.out.println("Front element: " + linkedListQueue.peek()); System.out.println("Removed element: " + linkedListQueue.remove()); System.out.println("Front element after removal: " + linkedListQueue.peek()); Queue<Integer> arrayDequeQueue = new ArrayDeque<>(); arrayDequeQueue.add(10); arrayDequeQueue.add(20); arrayDequeQueue.add(30); System.out.println("Is arrayDequeQueue empty? " + arrayDequeQueue.isEmpty()); System.out.println("Front element: " + arrayDequeQueue.peek());…arrow_forwardin Java 3. Implement an the ADT List (refer to the LAB 3-1)-Based of the ADT Queue and verify ""isEmpty()", "enqueue()", "dequeue()", "dequeueAll()", and "peak()" operations.arrow_forward
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