1 import java.text.SimpleDateFormat;  2 import java.util.Date;  3 import java.util.TimerTask;  4 public class TimerDemo extends TimerTask{
    5     public void run(){
    6         SimpleDateFormat sdf=null;  7         sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");  8         System.out.println(sdf.format(new Date()));  9     } 10 }

1 import java.util.Timer; 2 public class TestTask {
   3     public static void main(String[] args) {
   4         Timer t=new Timer(); 5         TimerDemo td=new TimerDemo(); 6         t.schedule(td, 1000,2000); 7     } 8 }