class JianZhu extends Thread{   //
	public void run(){
		System.out.println("");
		System.out.println("ˮˣ֪ͨ");	
		Thread yunshu = new YunShu();//߳
		yunshu.start();
		System.out.println("ӵȴˮ˵"); 
		try { 	yunshu.join();		}  //ȴ䵽
		catch (Exception e)	{       //ֹڵȴг쳣ж
			System.err.println(";");
			System.err.println("蹤ͣ");	}	
			System.out.println("蹤̼");
		}
	}
class YunShu extends Thread{   //
	public void run(){
		System.out.println("ӳˮ˻ҪСʱ");
		try {
			for (int i=1; i<=3; i++){  //ʱ
				Thread.sleep(3000);
				System.out.print("\nȴ"+i+"Сʱ ");
			}
		}
		catch (Exception e)	{    
			System.err.println(";");		
}	
		System.out.println("\nˮ˵");
}		
}
public class DiTie {               //
	public static void main (String args[]){
  Thread jianzhu=new JianZhu();//߳
       jianzhu.start();
	}
}
