Make a class TestArrayList with a main method: import java.util.*; public class TestArrayList { public static void main (String [] args) { ArrayList myList = new ArrayList(); myList.add("Z"); myList.add(0, "A"); System.out.println(myList); } } • Change the program so that without changing the statements already in program, the contents of the array at the end are: B C A F D
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Make a class TestArrayList with a main method:
import java.util.*;
public class TestArrayList {
public static void main (String [] args)
{ ArrayList myList = new ArrayList();
myList.add("Z");
myList.add(0, "A");
System.out.println(myList); } }
• Change the program so that without changing the statements already in program, the contents of the array at the end are: B C A F D
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- Implement a class CountingArrayList that extends ArrayList<String> and that counts the number of calls to get and set. import java.util.ArrayList;import java.util.Collections; public class CountingArrayListTester{ public static String smallest(ArrayList<String> values) { String smallestSoFar = values.get(0); for (int i = 1; i < values.size(); i++) { String value = values.get(i); if (value.compareTo(smallestSoFar) < 0) { smallestSoFar = value; } } return smallestSoFar; } public static void main(String[] args) { CountingArrayList words = new CountingArrayList(); words.add("Mary"); words.add("had"); words.add("a"); words.add("little"); words.add("lamb"); words.add("its"); words.add("fleece"); words.add("was"); words.add("white"); words.add("as"); words.add("snow"); String smallest = smallest(words);…Java Implement 5 methods given below in MyStringArrayList class // Add a new element, e, at the beginning of this list public void addFront(String e){ } //search for element e, returns true if found, otherwise returns false. public boolean contains(String e){ } //return the element at position i, otherwise returns null public String getElement(int i){ } // remove the element at specified index, returns the element that is being removed. Returns null if specified index is invalid. public String removeElementAt(int i){ } //returns a String representation of this list. public String toString(){ }Fix the following method printEvenIndex so that it will print out the Integers at even indices of the passed-in ArrayList list. import java.util.*; public class Test1 { public static void printEvenIndex(ArrayList<Integer> list) { for (int i) { if (i % 2 == 1) { System.out.print(list.get(i) + ", "); } } } public static void main(String[] args) { //instantiate ArrayList and fill with Integers ArrayList<Integer> values = new ArrayList<Integer>(); int[] nums = {1, 5, 7, 9, -2, 3, 2}; for (int i = 0; i < nums.length; i ++) { values.add(nums[i]); } System.out.println("Expected Result:\t 1, 7, -2, 2,"); System.out.print("Your Result:\t\t "); printEvenIndex(values); } }
- 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.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.In java A supermarket wants to reward its best customer of each day, showing the customer’s name on a screen in the supermarket. For that purpose, the store keeps an ArrayList.Create a class customer having id, name, gender, and bill provide appropriate getters/setters and constructors also provide toString method.In the Store class, make an ArrayList of customers, store name, and address implement methods public void addSale(Customer c) that will add customers to the arraylist.public void RemoveCustomer(int id);public void UpdateCustomerRecord(int Id);public displayAll();public String nameOfBestCustomer() to record the sale and return the name of the customer with the largest sale. public ArrayList nameOfBestCustomers(int topN) so that it displays the top customers, that is, the topN customers with the largest sales, where topN is a value that the user of the program supplies. Write a program that prompts following menu and ============================================…
- In java, Implement a method that removes all duplicates. Keep the first instance of the element but remove all subsequent duplicate elements.public void removeDuplicates() see the picture for the right output. Given files: Demo6.java public class Demo6 { public static void main(String[] args) { MyLinkedList<String> list = new MyLinkedList<>(); TestBench.addToList(list); TestBench.addToList(list); TestBench.addToList(list); TestBench.addToList(list); for (int x = 0; x < list.size(); x += 1 + x/3) { System.out.println("Removing element at index: " + x); list.remove(x); } System.out.println("Result"); System.out.println(list); System.out.println("Shuffling"); list.shuffle(7777); System.out.println(list); System.out.println("Removing duplicates (keeping first instance)"); list.removeDuplicates(); System.out.println(list); }} TestBench.java import java.util.AbstractList; public class TestBench { public static…Given an ArrayList of integers, return an ArrayList where all the odds are before the evens in the order that they occur. import java.util.ArrayList;public class EvenAfterOdds{public static ArrayList<Integer> solution(ArrayList<Integer> nums){// ↓↓↓↓ your code goes here ↓↓↓↓return new ArrayList<>();}}Write a Java method named average. The method should take an ArrayList of Integers as a parameter, compute the average of the elements in the ArrayList and return the average to the calling method.
- a Java method that takes an array of integers as its only parameter and returns the "centered" average of that list as a double. If the smallest or largest value occurs more than once, only keep one copy.In java Write a method public static ArrayList<Integer> append(ArrayList<Integer> a, ArrayList<Integer> b) that appends one array list after another. Ex: a = 1 2 3 4 5, b = 6 7 8 9 10 then append returns 1 2 3 4 5 6 7 8 9 10a Java static method that will take in one parameter, an Array of integers.then have the function return a new ArrayList comprised only of the even numbers in the array parameter.