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();    }}

输出结果为每隔1000毫秒输出