Custom String Length Comparator Java

The default sort method for strings is Java is it's character values. For example, If we have a string array:

String [] strs = {"abc", "xyz", "mnop123"};

And we use Arrays.sort(strs), the output will be in the following order:

abc
mnop123
xyz

But there are times, when we want to sort strings, by their length. The following custom string length comparator will serve the purpose:

import java.util.Comparator;

public class CustomStringLengthComparator implements Comparator{

 public int compare(String o1, String o2) {
  if (o1.length() < o2.length()) {
        return -1;
      } else if (o1.length() > o2.length()) {
        return 1;
      } else {
        return 0;
      }
 }

}

Instead of using

Arrays.sort(strs)

we have to use

Arrays.sort(strs, new CustomStringLengthComparator());