import java.util.*; public class TheLists { public static void main(String [] args) { List TheList1 = new ArrayList (); System.out.println("\n\tHow is the list TheList filled:"); System.out.println("\n\t" + TheList1); TheList1.add("1"); TheList1.add("2"); TheList1.add("3"); TheList1.add("4"); TheList1.add("4"); TheList1.add("5"); System.out.println("\n\tWe added elemnts in the list TheList1 :"); System.out.println("\n\t" + TheList1); swap(TheList1,0,4); System.out.println("\n\tWe swapped the First and the Fifth elements in the ist TheList1 :"); System.out.println("\n\t" + TheList1); swap(TheList1,2,3); System.out.println("\n\tWe swapped the Third and the Fourth elements fron the latter list :"); System.out.println("\n\t" + TheList1); Collections.shuffle(TheList1) ; System.out.println("\n\tWe shuffled the latter list :"); System.out.println("\n\t" + TheList1); Collections.reverse(TheList1) ; System.out.println("\n\tWe reversed the latter list :"); System.out.println("\n\t" + TheList1); Collections.reverse(TheList1) ; System.out.println("\n\tWe reversed the latter list :"); System.out.println("\n\t" + TheList1); System.exit(0); } public static void swap(List a, int i, int j) { Object tempo = a.get(i); a.set(i, a.get(j)); a.set(j, tempo); } } Execution: C:\Java>java TheLists How is the list TheList filled: [] We added elemnts in the list TheList1 : [1, 2, 3, 4, 4, 5] We swapped the First and the Fifth elements in the ist TheList1 : [4, 2, 3, 4, 1, 5] We swapped the Third and the Fourth elements fron the latter list : [4, 2, 4, 3, 1, 5] We shuffled the latter list : [4, 1, 2, 5, 3, 4] We reversed the latter list : [4, 3, 5, 2, 1, 4] We reversed the latter list : [4, 1, 2, 5, 3, 4] C:\Java>
