Please, help me out.

import java.util.*; public class SetListPerformanceTest { static final int N = 35500; public static void main(String[] args) { // Add numbers 0, 1, 2, ..., N - 1 to the array list List list = new ArrayList<>(); for (int i = 0; i < N; i++) list.add(i); Collections.shuffle(list); // Shuffle the array list // Create a hash set, and test its performance Collection set1 = new HashSet<>(list); System.out.println("Member test time for hash set is " + getTestTime(set1) + " milliseconds"); System.out.println("Remove element time for hash set is " + getRemoveTime(set1) + " milliseconds"); // Create a linked hash set, and test its performance Collection set2 = new LinkedHashSet<>(list); System.out.println("Member test time for linked hash set is " + getTestTime(set2) + " milliseconds"); System.out.println("Remove element time for linked hash set is " + getRemoveTime(set2) + " milliseconds"); // Create a tree set, and test its performance Collection set3 = new TreeSet<>(list); System.out.println("Member test time for tree set is " + getTestTime(set3) + " milliseconds"); System.out.println("Remove element time for tree set is " + getRemoveTime(set3) + " milliseconds"); // Create an array list, and test its performance Collection list1 = new ArrayList<>(list); System.out.println("Member test time for array list is " + getTestTime(list1) + " milliseconds"); System.out.println("Remove element time for array list is " + getRemoveTime(list1) + " milliseconds"); // Create a linked list, and test its performance Collection list2 = new LinkedList<>(list); System.out.println("Member test time for linked list is " + getTestTime(list2) + " milliseconds"); System.out.println("Remove element time for linked list is " + getRemoveTime(list2) + " milliseconds"); } public static long getTestTime(Collection c) { long startTime = System.currentTimeMillis(); // Test if a number is in the collection for (int i = 0; i < N; i++) c.contains((int)(Math.random() * 2 * N)); return System.currentTimeMillis() - startTime; } public static long getRemoveTime(Collection c) { long startTime = System.currentTimeMillis(); for (int i = 0; i < N; i++) c.remove(i); return System.currentTimeMillis() - startTime; } } 

Add at least 3 data structures that are not in it. For example the stack data structure.

For each of the 3 new data structures add to them the elements in "list" using whatever "add" method is appropriate and them and then use the getTestTime() and getRemoveTime methods on them.