package package_1;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

public class Test_1 {

    public static void main(String[] args) {

        Timer timer = new Timer();

        timer.schedule(new Task(), 2000, 1000);//(执行的操作，等待多少毫秒执行，每隔多少毫秒执行一次)

    }

}

class Task extends TimerTask{

    public void run(){

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        System.out.println(dateFormat.format(new Date()));

    }

}