//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()+' '); } } }