//自定义排序
 import java.util.*;
 public class test62 {
     public static void main(String[] args){
         TreeSet tree=new TreeSet();//创建一个采用默认树形自然排序的对象
         tree.add(new Integer(50));
         tree.add(new Integer(150));
         tree.add(new Integer(250));
         tree.add(new Integer(450));
         tree.add(new Integer(350));
         tree.add(new Integer(750));
         //获取当前TreeSet的倒序排序器
         Iterator it=tree.descendingIterator();
         while(it.hasNext()){
             System.out.println(((Integer)it.next()).intValue()+' ');
         }
     }
 }