Consider class IntArrayStack that has two instance variables: int[] data and int top. Implement an instance method inside the IntArrayStack, called popBottom(),that extracts and returns as output the element at the bottom of the stack. All other elements in the stack must remain unchanged and in the same ord
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Consider class IntArrayStack that has two instance variables: int[] data and int top. Implement an instance method inside the IntArrayStack, called popBottom(),that extracts and returns as output the element at the bottom of the stack. All other elements in the stack must remain unchanged and in the same order.
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- Write a method called changeQueue to be considered inside the ArrayQueue class and has one parameter item of type E. Your method will change the queue in such a way that if the the first element of the queue and the last element of the queue are equal, the first and last elements in the queue will be replaced with item, otherwise, do not do any change. Similarly, the same process is done for the second element in the queue and the element before the last in the queue and so on. Assume you have a non-empty queue with even number of elements. You are not allowed to call any method from the the ArrayQueue class. Do not use iterators. Method head: public void changeQueue(E item) Example1: Before run: front rear “this” queue: 10 29 2 2 5 10 Item1: 100 After run: front rear “this” queue: 100 29 100 100 5 100Write a class MySortedArrayCollection that Inherit the SortedArrayCollection class show in screen shot and such that all the following methods are implemented in java, then write a driver program to test the methods public String toString() // Creates and returns a string that correctly represents the current collection. public T smallest() // Returns null if the collection is empty, otherwise returns the smallest element of the collection. public int greater(T element) // Returns a count of the number of elements e in the collection that are greater then element, that is such that e.compareTo(element) is > 0 public MySortedArrayCollection <T> combine (MySortedArrayCollection<T>other) // Creates and returns a new SortedArrayCollection object that is a combination of this object and the argument object. public T []toArray() // Returns an array containing all of the elements of the collection. public void clear() // Removes all elements. public boolean equals(Object o)…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.
- Using the picture, ultilize Java to design a container class and implement the class PascalTriangle that will generate a Pascal Triangle from a given number of rows. Please represent each row in a triangle as a list and the entire triangle as a list of these lists, implement the class ArrayList for these lists. Inside this Java container class, develop a method called getChoice that takes in two parameters n and k (where n is the number for row and k is the position) and returns the integer value of C(n, k). For example, getChoices (5, 2) will return 7.Write the method filterBySize().* * Given an ArrayList of String, return a new list where only * strings of the given length are retained.* * Examples:* filterBySize(["a", "bb", "b", "ccc"], 1) returns ["a", "b"]* filterBySize(["a", "bb", "b", "ccc"], 3) returns ["ccc"]* filterBySize(["a", "bb", "b", "ccc"], 4) returns []Implement unique method that takes an ArrayList as input and returns an ArrayList withexactly a single occurrence of each element from the input list. For example, if the input listcontains 5, 6, 7, 6, 3, 5, 5, 4 then the output list should have 5, 6, 7, 3, 4.Note: (1) You may assume that the ArrayList has a specific type of elements in it. In the class, we assumedit to have String type values. (2) You may only work with ArrayList(s).
- Make this generic, instead of a Stack of Pancake. public class Stack { private ArrayList<Pancake> plateful; public Stack() { plateful = null; } public void push (Pancake p) { Pancake newp = new Pancake (p); // copy constructor plateful.add(newp); } public Pancake pop (Pancake p) { Pancake newp = plateful.get(plateful.size()-1); plateful.remove(plateful.size()-1); return newp; } } // end of class definitionUsing the picture, use Java to design and implement the class PascalTriangle that will generate a Pascal Triangle from a given number of rows. Represent each row in a triangle as a list and the entire triangle as a list of these lists, implement the class ArrayList for these lists.Write a Java method that will take in a generic ArrayList with Doubles (reference type). Have the method take each Double and convert it to an Integer and store it into another generic ArrayList that holds Integers. When done, return the new Integer ArrayList.
- . For the TimeSpan class described below, add a compareTo method that takes another TimeSpan object as a parameter & returns: -1 if this TimeSpan is SMALLER than to the TimeSpan object passed in as a parameter 0 if both TimeSpans are the same 1 if this TimeSpan is GREATER than the TimeSpan object passed in as a parameter Add code, as needed, to allow the Collections class to sort the ArrayList of TimeSpan objects import java.util.*; public class TimeSpan implements { private int hours; private int minutes; public TimeSpan(int hours1, int minutes1) { hours = 0; minutes = 0; add(hours1, minutes1); } public void add(int hours1, int minutes1) { hours += hours1; minutes += minutes1; while (minutes > 60) { minutes -= 60; // convert 60 min --> 1 hour hours++; } } public void add(TimeSpan time) { add(time.hours, time.minutes); }…Write a program in the Java language that includes: 1. A class for books, taking into account the encapsulation and getter, setter. 2. Entering books by the user using Scanner 3. LinkedList class for: (Adding a new book - Inserting a book- Searching for a book using the ISBN Number - Viewing all books,delete book). 4. Serial number increases automatically with each book that is entered. 5. Printing the names of books is as follows: Serial - ISBN - Name - PubYear - Price - Notes. 6-Design a main menu that includes: • Add Book • Insert Book • Delete Book • Search . Display . ExitImplement a new class that implements Comparatorof GregorianCalendar class to be able sort the calendar in increasingorder based on day, month, and year, in that order. Write a method to displaythe GregorianCalendar instance in “dd-MMM-yyyy” format usingSimpleDateFormatclass. Write a test program with 10 GregorianCalendarinstances and display the results after the sort.