Java STL

1.  override Comparator

import java.util.HashSet;

import java.util.Stack;

import java.util.Vector;

import java.util.Queue;

import java.util.PriorityQueue;

import java.util.Comparator;



public class test1 

{



    public static void main(String[] args) 

    {

        PriorityQueue<Integer> q1 = new PriorityQueue<Integer>(10,myComparator);

        Integer i1=new Integer(1);

        Integer i2=new Integer(2);

        q1.add(i1);

        q1.add(i2);

        while(!q1.isEmpty())

        {

              System.out.println(q1.poll());

        }



    }

    public static Comparator<Integer> myComparator = new Comparator<Integer>(){

        

        @Override

        public int compare(Integer c1, Integer c2) {

            return (int) (c2.intValue() - c1.intValue());

        }

    };



}