package com.chnfuture;class MyThread extends Thread{    MultiThread t = new MultiThread();    public void run(){      t.test();      System.out.println("Thread say:Hello,World!");    }}public class MultiThread {      int x = 0;    public synchronized void test(){      if(x==0)        try{          wait();        }catch(Exception e){}    }    public static void main(String[] args) throws Exception{      new MyThread().start();    }}