String.CASE_INSENSITIVE_ORDER

static Comparator<String> CASE_INSENSITIVE_ORDER: A Comparator that orders String objects as by compareToIgnoreCase.


import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Main {
  public static void main(String[] argv) {
    List<String> list = new ArrayList<String>();
    list.add("java2s.com");
    list.add("Java2s.com");
    list.add("A");
    list.add("a");
  
    Collections.sort(list, String.CASE_INSENSITIVE_ORDER);
 
    System.out.println(list);
  }
}

The output:


[A, a, java2s.com, Java2s.com]