Comparator and treemap

Question

Hi
I have treemap of integer as key and list as value which is giving results
(2,email)
(1,dfg)
(4,dfgh).
But I have to show result in descending order sorted by key of integer
like (4,dfgh)
2,email
1,dfg
how to do it.comparator used but not worked

Answer 1

Hi Rashmi,
what ever the code sample posted by you is working for me. please check this
public class TreeMapSorting
     public static void main(String[] args)
          TreeMap<Integer,Object > ab1= new TreeMap<Integer,Object>();
          ab1.put(5, "sometext5");
          ab1.put(3, "sometext3");
          ab1.put(4, "sometext4");
          ab1.put(2, "sometext2");
          TreeMap<Integer,Object > tm2= new TreeMap<Integer,Object>(new Decreasin());
          tm2.putAll(ab1);
          System.out.println(tm2);
class Decreasin implements Comparator<Integer>{
     public int compare(Integer i2,Integer i1){
     return i1.compareTo(i2);
}Edited by: sri06 on Aug 12, 2008 7:28 AM