这是我自己参考资料写了一个java定时器

				package dark.timer.example;
				import java.text.SimpleDateFormat;
				import java.util.Date;
				
				import org.tiling.scheduling.DailyIterator;
				import org.tiling.scheduling.Scheduler;
				import org.tiling.scheduling.SchedulerTask;
				
				public class AlarmClock
				{
				
					private final Scheduler scheduler = new Scheduler();
				
					private final SimpleDateFormat dateFormat =
						new SimpleDateFormat("dd MMM yyyy HH:mm:ss.SSS");
				
					private final int hourOfDay, minute, second;
				
					public AlarmClock(int hourOfDay, int minute, int second)
					{		
						this.hourOfDay = hourOfDay;
						this.minute = minute;
						this.second = second;
					}
				
					public void start()
					{
						scheduler.schedule(new SchedulerTask()
						{
							public void run()
							{
								soundAlarm();
							}
							private void soundAlarm()
							{
								System.out.println(
									"Wake up! " + "It's " + dateFormat.format(new Date()));
								// Start a new thread to sound an alarm...
							}
						}, new DailyIterator(hourOfDay, minute, second));
					}
				
					public static void main(String[] args)
					{
						AlarmClock alarmClock = new AlarmClock(13, 31, 0);
						alarmClock.start();
					}
				}