RevStrSort

/** * Sort an array of strings in reverse order.  */package StrRegex;import java.util.*;/** * Create a comparator that returns the outcome * of a reverse string comparison. */class RevStrComp implements Comparator< String > {/** * Implement the compare() method so that it * reverses the order of the string comparison. */public int compare(String strA, String strB) {//  Compare strB to strA, rather than strA to strB.return strB.compareTo(strA);}}/** * Demonstrate the reverse string comparator. */public class RevStrSort {/** * @param args */public static void main(String[] args) {// Create a sample array of strings.String strs[] = { "dog", "horse", "zebra", "cow", "cat" };// Show the initial order.System.out.print("Initial order : ");for (String s : strs) {System.out.print(s + " ");}System.out.println("\n");// Sort the array in reverse order.// Begin by creating a reverse string comparator.RevStrComp rsc = new RevStrComp();// Now, sort the strings using the reverse comparator.Arrays.sort(strs, rsc);// Show the reverse sorted order.System.out.print("Sorted in reverse order : ");for (String s : strs) {System.out.print(s + " ");}System.out.println("\n");// For comparison, sort the strings in natural order.Arrays.sort(strs);// Show the natural sorted order.System.out.print("Sorted in natural order : ");for (String s : strs) {System.out.print(s + " ");}System.out.println("\n");}}