2021-11-02

多线程写时钟

package com.test;

import java.text.SimpleDateFormat;
import java.util.Date;

public class Thread1 extends Thread{
        SimpleDateFormat sdf=new SimpleDateFormat("HH:mm:ss");

    @Override
    public void run() {
        while (true){
            try {
                System.out.println(sdf.format(new Date()));
                sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }
    }
}

package com.test;

public class Main {

    public static void main(String[] args) {
	Thread1 thread1= new Thread1();
	thread1.start();
    }
}