fork download
copy 
  1. import java.util.*;
  2.  
  3. class KeyComparator implements Comparator
  4. {
  5.     public int compare(Object a, Object b) 
  6.     {
  7.         if ((char) a > (char) b)
  8.         	return 1;
  9.         else
  10.         	return -1;
  11.     }
  12. }
  13.  
  14. class Tester
  15. {
  16.      public static void main(String[] args)
  17.      {
  18.            Map map = new TreeMap(new KeyComparator());
  19. 			map.put('B', 3);          
  20. 			map.put('A', 1);
  21. 			map.put('C', 2);
  22.  
  23.            System.out.print(map);
  24.      }
  25. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
{A=1, B=3, C=2}
https://ideone.com/6IdTwh
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!