public class MultiTimer {
	private MultiCallback[] callbacks = null;
	int numCallbacks = 0;
	static public final int MAX_CALLBACKS = 10;
	
	public MultiTimer() {
		callbacks = new MultiCallback[MAX_CALLBACKS];
	}
	
	public void addCallback(MultiCallback theCallback) {
		if (numCallbacks < (MAX_CALLBACKS - 1)) {
			callbacks[numCallbacks] = theCallback;
			numCallbacks = numCallbacks + 1;
		} else {
			System.out.println("Error: Can't add any more callbacks");
		}
	}
	
	public void run() {
		int tickNum = 0;

		while (true) {
			for (int i = 0; i<numCallbacks; i++) {
				callbacks[i].tick(tickNum);
			}
			tickNum = tickNum + 1;

			try {
				Thread.sleep(1000);
			} catch(InterruptedException e) {}
		}
	}
}