package test;

class TestThread extends Thread{

public void run()

{

    for(int n=0;n<3;n++)

    { try{Thread.sleep(1000);}//线程休息毫秒

    catch(InterruptedException e){e.printStackTrace();}

    System.out.println("n="+n);

    }

}

}

package test;

public class Testlianxithread {

    public static void main(String[] args) {

        TestThread tt = new TestThread();

        tt.start();// 启动多线程

        TestThread tt2 = new TestThread();

        tt2.start();

        TestThread tt3 = new TestThread();

        tt3.start();

    }

}