public class GeneralThreadRun {
	public static void main(String[] args) throws InterruptedException {
		GeneralThread gt = new GeneralThread();
		new Thread(gt).start();
		Thread.sleep(1000);
		gt.getAlarm();
		Alarm.timer.cancel();
	}
}

class GeneralThread implements Runnable {
	@Override
	public void run() {
			Calendar cal = Calendar.getInstance();
			cal.add(Calendar.SECOND, 5);		
			long time = cal.getTimeInMillis() - System.currentTimeMillis();
			Date date = new Date(System.currentTimeMillis() + time);
			new Alarm(date);
	}

	public void setAlarm(Alarm alarm) {
		this.alarm = alarm;
	}

	static class Alarm {
	    static Timer timer;
	    public Alarm(Date date) {
	        timer = new Timer();
	        timer.schedule(new AlarmTask(), date);
	    }
		private static class AlarmTask extends TimerTask {
	        public void run() {
	        	System.out.println("alarm");
	            timer.cancel();
	        }
	    }
	}
}

new Alarm(date);

public class GeneralThreadRun {
	public static void main(String[] args) throws InterruptedException {
		GeneralThread gt = new GeneralThread();
		new Thread(gt).start();
	}
}

class GeneralThread implements Runnable {
	
	@Override
	public void run() {
			Calendar cal = Calendar.getInstance();
			cal.add(Calendar.SECOND, 5);		
			long time = cal.getTimeInMillis() - System.currentTimeMillis();
			Date date = new Date(System.currentTimeMillis() + time);
			new Alarm(date);
			try {Thread.sleep(100);} catch (InterruptedException e) { }
			new Alarm(new Date(System.currentTimeMillis() + time));
	}

	static class Alarm {
		Timer timer;
		public Alarm(Date date) {
	        timer = new Timer();
	        timer.schedule(new AlarmTask(), date);
	    }
		private class AlarmTask extends TimerTask {
	        public void run() {
	        	System.out.println("alarm");
	            timer.cancel();
	        }
	    }
	}
}