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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- IN JAVA This triple-ended queue exercise can be found at https://open.kattis.com/problems/teque. The requirements for this program are compatible with those of the Kattis problem, so a solution should produce correct results when submitted on Kattis. The Triple-Ended QUEue supports four operations: push_back x: inserts the element x at the end of the TEQUE push_front x: inserts the element x at the front of the TEQUE push_middle x: inserts the element x so that the insertion index for x is (k + 1)/2 for a 0-based indexed TEQUE. get i: prints out the ith index element (0-based) of the TEQUE. The TEQUE will be implemented as a linked list. The usual implementation requirements apply along with a screenshot of the results from Kattis. Sample input 10 push_back 1 push_front 2 push_back 3 push_front 4 push_middle 5 push_back 6 get 3 push_middle 7 push_middle 8 get 5 Sample Output 1 1 Subject: Java ProgrammingA singly linked circular list is a linked list where the last node in the list points to the first node in the list. A circular list does not contain NULL pointers. A good example of an application where circular linked list should be used is a items in the shopping cart In online shopping cart, the system must maintain a list of items and must calculate total bill by adding amount of all the items in the cart, Implement the above scenario using Circular Link List. Do Following: First create a class Item having id, name, price and quantity provide appropriate methods and then Create Cart/List class which holds an items object to represent total items in cart and next pointer Implement the method to add items in the array, remove an item and display all items. Now in the main do the following Insert Items in list Display all items. Traverse the link list so that each items bill gets calculated (by multiplying quantity with price) and also calculate and display Total bill in the end.…1. Can you "pop" from a queue -- in other words, is there any reason why you couldn't just copy over the method (after modifying it for generics) to use it in the queue class? 2. Look at the pre-condition and post-condition for nextInt (reproduced below): private int nextIndex(int i) // Precondition: 0 <= i and i < data.length // Postcondition: If i+1 is data.length, // then the return value is zero; otherwise // the return value is i+1.Explain them, including answers to the following in your response : What method uses nextIndex( )? Why is the precondition necessary? Why does the behavior described postcondition make sense? import java.util.EmptyStackException; public class ArrayStack implements Cloneable{private int[ ] data;private int manyItems; public ArrayStack( ){final int INITIAL_CAPACITY = 10;manyItems = 0;data = (int[]) new int[INITIAL_CAPACITY];} public ArrayStack(int initialCapacity){if (initialCapacity < 0)throw new…
- Write a Java public static general method that doesn't belong to the Queue class(assuming the Queue type is Book and Book has a clone method, Book also has a method called getGenre() which returns the genre of the book): Queue findOneGenreBooks(Queue Q, String genreType) that searches in the first parameter Q for all books that has the same genre type as defined by the second parameter genreType, return all of the books that have the specified genre type as a Queue. (For example, you may want to find all cartoon books and return them as a Queue). Please note: You are only allowed to use the Queue class which has constructors, enqueue, dequeue, front, isEmpty, size, toString, and clone methods.The implementation of a queue in an array, as given in this chapter, uses the variable count to determine whether the queue is empty or full. You can also use the variable count to return the number of elements in the queue. On the other hand, class linkedQueueType does not use such a variable to keep track of the number of elements in the queue. Redefine the class linkedQueueType by adding the variable count to keep track of the number of elements in the queue. Modify the definitions of the functions addQueue and deleteQueue as necessary. Add the function queueCount to return the number of elements in the queue. Also, write a program to test various operations of the class you defined.Write a Java public static general method which doesn't belong to Queue class(assuming the Queue type is Book and Book has a clone method, Book also has a method called getGenre() which returns the genre of the book): Queue findOneGenreBooks(Queue Q, String genreType) that searches in the first parameter Q for all books that has the same genre type as defined by the second parameter genreType, return all of the books that have the specified genre type as a Queue. (For example, you may want to find all cartoon books and return them as a Queue). Please note: You are only allowed to use the Queue class which has constructors, enqueue, dequeue, front, isEmpty, size, toString, and clone methods.
- Working with Queues 1. Create a method on the Queue class that calculates the number of times a given value occurs in the queue. int Queue::count( const T & data ) const; Example: count(…) function Result Queue count (5) 3 front->(1) (1) (5) (3) (5) (5) (2)<-back count (10) 0 front->(1) (1) (5) (3) (5) (5) (5) (2)<-back 2. Create a method on the Queue class that determines whether the queue is in descending order. bool Queue::isDecreasing( ) const; Example: isDecreasing() function Result Queue count (5) true front->(10) (9) (8) (7) (1)<-back count (10) false front->(1) (1) (5) (3) (5) (5) (5) (2)<-back 2Please Use Java language 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: 1,10,2,20,3,30,4,5A linked list is developed with the following set of nodes in sequence: 25, 40, 66, 38 and 53. The list first node is referred by First reference variable. The second node is referred by P reference variable while the second last node is referred by Q reference variable. Compose Java statements for the following operations: a) Replace the third node value to 55 using all possible reference variables. b) Delete the last node using the shortest path of reference variable. Then deallocate the memory. Shows all steps involved. c) Insert new node with value 99. Make the new node as third node in the list. Shows all steps involved. d) Destroy the linked list.
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