例七.txt

这是一本java基础教程 对新手上路有很大帮助

public class Example8_7{
    public static void main(String args[ ]){
        A a=new A();
        a.thread.start();
    }
}
class A implements Runnable{
    Thread thread;
    int n=0;
    A(){
       thread=new Thread(this); 
    } 
    public void run(){
        while(true){
            n++;
            System.out.println(new java.util.Date());
            try{  Thread.sleep(1000);
            }
            catch(InterruptedException e) {}
            if(n==3){
                thread=new Thread(this);
                thread.start();
            }
        }
    }
}