Write a method that takes as parameters two sorted stacks of integers s1 and s2 (where the lowest value is at the top) and returns a sorted stack (lowest on top) that contains the values of both sl and s2. You are allowed to use only the stack operations such as pop, push, and top. You are allowed to use only stacks as temporary storage. No other data structures such as arrays are allowed. The header of the method is: public static Stack mergeSortedStacks (Stack s1, Stack s2) Write a main method in which you create two sorted stacks and call the above method to test it.
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- Write a method called removeBelow in the class StackApplication that accepts two parameters called elem of type int and an ArrayStack of integers st. The method should remove all the elements of the stack that are below elem from the stack. Example: elem: 15 top Stack (before method call): 20 14 18 16 10 top Stack (After method call): 20 18 16 Method heading: public static void removeBelow(int elem, ArrayStack<Integer> st) type it here pleaseIN JAVA Suppose that in the array-based stack, the array doubles in size after multiple push operations. But later on, fewer than half of the array’s locations might actually be used by the stack due to pop operations. Revise the implementation so that its array also can shrink in size as objects are removed from the stack. Accomplishing this task will require two new private methods, as follows: The first new method checks whether we should reduce the size of the array: private boolean isTooBig() This method returns true if the number of entries in the stack is less than half the size of the array and the size of the array is greater than 20. The second new method creates a new array that is three quarters the size of the current array and then copies the objects in the bag to the new array: private void reduceArray() Implement each of these two methods, and then use them in the definition of pop()rite a method called samePosition in a class called StackExt that receives two parameters st1 and st2 of type ArrayStack and a third parameter pos of type int. The method returns true, if stack st1 and st2 contains the same value in position pos. Otherwise, the method returns false. Assume that both stacks st1 and st2 contain same number of elements. Assume that the position of the top element is 0 and increases by 1 for each subsequent element. The elements of both stacks st1 and st2 must remain in the original relative positions in the stacks at the end of the method. Use common stack operations only such as push, pop, peek, isEmpty, constructor and copy constructor. You can create temporary objects of type ArrayStack in your method. Example: top st1: 4 5 3 10 8 st1: 5 9 4 10 1 If the pos is 3, then both stacks contain 10 in position 3. The method returns true. If the pos is 1, then st1 contains 5 and st2 contains 9 in…
- Given a stack of positive integers, write a Java method called movePrimes that rearranges elements of the stack such that all prime numbers are below none primes regardless to the order of primes. Note: You are allowed to create only one other stack. You can not use other data structures such as array, arraylist, queue, ....etc. Consider the following example: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.To help manage the wizarding world, we need to write a reverse method. For the general purpose, let us write a generic reverse method. Namely, given an array of T objects, the reverse method would use a stack to reverse these T objects and return a new ArrayList with these T objects in reverse order. The generic method prototype is as follows: public <T> ArrayList<T> reverse(T[] wizards) throws Exception; To help reverse Hogwarts students' names, we can invoke the method as follows: reverse({"Harry Potter", "Ronald Bilius", "Hermione Jean Granger"}) , where {"Harry Potter", "Ronald Bilius", "Hermione Jean Granger"} is an array input and it will return an java.util.ArrayList instance, containing "Hermione Jean Granger" as the first element, "Ronald Bilius" as the second element, and "Harry Potter" as the third element. Task 1. Please use a Stack to implement the generic reverse method: public ArrayList reverse(T[] wizards) throws Exception First write…
- What is the best way to implement a stack or a queue so that it can hold an arbitrary number of elements? Select one: a. Using an array, and throwing an exception when the stack or queue is full. b. By creating a bigger array when the stack or queue is full, and copying the elements from the original array. c. Using linked lists to store the collection of elements.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 classIn Java please create a generic stack code and implement these methods peek() returns a reference to the item at the top of the stack without removing it from the stack contains(T t) is a boolean method that returns true if the stack contains t, the parameter, otherwise returns false. The stack contains t if at least one T on the stack is equal to t using the equals() method. Note that there is always an available equals() method in Java, because Object, the common parent of all classes, contains one. Implement this method without using the contains()method of the list.
- Write a method of the ArrayBoundedStack class to swap the item at the bottom of the stack with the item at the top of the stack. Do not use any other stack methods in your code. The fields of the ArrayBoundedStack are:run the main() method of class Lab11D. Pls do the SWAPIN LAB 11D and below is the tester For example, A B C D E F should turn into D E F A B C. You should assume that the array list has an even number of elements (not necessarily 6). One solution is to keep removing the element at index 0 and adding it to the back. Each step would look like this: A B C D E F B C D E F A C D E F A B D E F A B C When you run the code, you will find that there is a lot of movement in the array list. Each call to remove(0) causes n - 1 elements to move, where n is the length of the array. If n is 100, then you move 99 elements 50 times, (almost 5000 move operations). That's an inefficient way of swapping the first and second halves. (Learn more about time complexity at the end of the lab). Come up with a better way in which you swap the elements directly. Hint: How do you swap the two elements A and D? A B C D E F D B C A E F D E C A B F D E F A B C Write pseudocode for this algorithm. Add…Your activity: write a same java program that will accept 20 integer in a list and returns the index of the first occurrence of the smallest element in the array. Also, write a program to test your method. Write a Java method, smallestIndex, that takes as its parameters an int array and its size, and returns the index of the (first occurrence of the) smallest element in the array. public class Array_labExercise2 { public static void main(String[] args) { int[] list = {56, 34, 67, 54, 23, 87, 66, 92, 15, 32, 55, 15, 88, 22, 30}; System.out.print("List elements: "); printArray(list); System.out.println(); System.out.println("Index of the (first occurenc of the) " + "smallest element in list is: " + smallestIndex(list)); System.out.println("Smallest element in list is: " + list[smallestIndex(list)]); } public static void printArray(int[] list) { int counter; for (counter = 0; counter < list.length; counter++) System.out.print(list[counter] + " ");…