String Display in ascending and descending using comparator interface in java

String Display in ascending and descending using comparator interface in java

package com.demo;

import java.util.Arrays;

import java.util.Comparator;

public class StringOperations {

public static void main(String[] args) {

String[] names = {"Chenni", "Mumbai", "Delhi","Agra","Andhra","Patna"};

// Ascending

System.out.println("Ascending");

System.out.println("---------");

Arrays.sort(names);

displayLoop(names);

// Descending

System.out.println("Descending");

System.out.println("----------");

Comparator<String> descending = new DescendingComparator();

Arrays.sort(names,descending);

displayLoop(names);

}

private static void displayLoop(String[] names) {

for(String namedisplay:names)

{

System.out.println(""+namedisplay);

}

}

}

Class DescendingComparator

package com.demo;

import java.util.Comparator;

public class DescendingComparator implements Comparator<String> {

@Override

public int compare(String str1, String str2) {

// TODO Auto-generated method stub

return str2.compareTo(str1);

// return str1.compareTo(str2);

// return str1.concat(str2);

}

}