Implement, using only the Queue kernel methods, the static method declared as follows and answer the questions below: Reports the smallest integer in the given {@code Queue). @param q the queue of integer @return the smallest integer in the given queue @requires q /= empty_string @ensures min is in entries (q) and for all x: integer where (x is in entries (q)) (min <= x) ivate static int min (Queue q) {...} i. Why do you need the requires clause? ii. Why is the first line of the ensures clause important (min is in entries (q))? Explain what the implementation could do if this line was not included in the postcondition.
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- This is a java question Trace through the state of the queue q in the following code fragment in the main method. You need to show the queue with its values for credit. Queue <Integer> q = new ArrayDeque<Integer>( );q.add(14);q.add(-47);q.offer(75);q.poll( );Integer v = q.peek( );q.add( v - 32);q.remove( );q.add(q.poll( ));System.out.println ("q has " + q);System.out.println ("v has " + v); Final Result for q: v:Use java language please 1.Write a method “mergeQueueStack” that takes a queue as a parameter of type: Queue of integers and a stack as a second parameter of type: Deque of integers Remove all the items from the queue and remove all the items from the stack then add them to a LinkedList by alternating between an item from queue then an item from stack. Don’t assume initially both the queue and the stack have the same number of items. The method should return the linked list of type integers. Example: If queue has : 1,2,3,4,5 and stack has 10, 20, 30 (where 10 is at top of the stack) then the linkedList should contain: 1,10,2,20,3,30,4,5Write a Java program to implement a queue by using arrayo Define a Queue interface.o Define an ArrayQueue class.o Define a Test class to test all methods first code package ArrayQueue; public class ArrayQueue<E> implements Queue<E> { public static final int CAPACITY=1000; private E[] data; private int f = 0; private int sz = 0; public ArrayQueue() { data = (E[]) new Object[CAPACITY]; } public ArrayQueue(int capacity) { data = (E[]) new Object[capacity]; } public int size() { return sz; } public boolean isEmpty() { return (sz == 0); } public void enqueue(E e ) throws IllegalStateException { if(sz == data.length) throw new IllegalStateException(" queue is full"); int enqueueIndex = (f + sz) % data.length; data[enqueueIndex] = e; sz++; } public E first() { if(isEmpty()) return null; return data[f]; } public E dequeue() { if(isEmpty()) return null; E answer = data[f]; data[f] = null; f= (f+1)% data.length; sz --; return answer; } } secound code package…
- Suppose that we would like to implement a queue system for a commercial website. Given that the website offers 3 items for sale (or a list of items), each item has a limit quantity in stock. Implement a queue of customers, each customer can buy only a few number product among the available three items. Determine the item name, their quantity in stock; Specify a queue of n customers, each customer can buy k products from one item (k is different for each customer); Customers take turn to enter (enqueue) and leave (dequeue) the queue according to the FIFO order to purchase wanted products; If a customer successfully purchased products, then display a message and reduce the number of products in stock; otherwise, if the item has been run out, display a warning message. Implement the above problems in C/C++ using a Queue data structur. Write a main function for testing all written functions.Implement a function bool moveNthElem(QueueSLL&,int n) that moves a queue element at the specified N position to the front of the queue. For example, assuming a queue with the elements {4,6,8,10} and n=3, the 3rd element which has the value 8 will move to the front of the queue. The updated queue will be {8,4,6,10}. The function may use an additional queue.Write a java program which follows conditions written below: Consisting of four (4) book titles entered by the user. Pop the stack's elements one by one; each popped element will be added to a queue. Then, print the content of the queue. Input: Enter four book titles. Book 1: Ibong Adarna Book 2: Florante at Laura Book 3: Ilustrado Book 4: ABNKKBSNPLAko?! Expected Output: New order of books: [ABNKKBSNPLAko?!, Ilustrado, Florante at Laura, Ibong Adarna]
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- Create a Queue implementation that makes use of a circular linked list, which is similar to a linked list but has the final value and no null connections.Whenever the list is not empty, next comes before first. one Node instance variable at a timeWrite a method to find the largest number in a given queue. The Objects in the queue are integers. You are using the standard Queue class that we discussed in this course. The Queue class has all the standard queue methods, such as, enqueue, dequeue, size, and dequeueAll. The Queue object, q, in the parameter of the method must contain the same elements in the same sequence before leaving the method as they were when entering the method. You are not allowed to use any temporary container (such as another queue, or a stack, or an array, or a linked list.) You can create variables of primitive data types (such as, an integer.) You must use the following header. public int largestNum(Queue q){1. Implement the “missing” front and rear operations in JAVA using constructor and Also write output: class Queue { private int maxSize; private long[] queArray; private int front; private int rear; private int nItems; public Queue(int s) // constructor { maxSize = s; queArray = new long[maxSize]; front = 0; rear = -1; nItems = 0; } // public void insert(long j) { // put item at rear of queue // public long remove() { // take item from front of queue //And then return } // public long peekFront() { // peek at front of queue //Return queue array front } // public boolean isEmpty(){ // true if queue is empty //return nItems zero } // public boolean isFull() { // true if queue is full return } // public int size() // number of items in queue { //return nItems; } // } // end class Queue //////////////////////////////////////////////////////////////// class QueueApp { public static void main(String[] args) { Queue theQueue = new Queue(5); // queue holds 5 items…