public static void main(String[] args) {
		List<Integer> list = new ArrayList<Integer>();
		int x;
		for (int i = 0; i < 10000; i++) {
			// System.out.println(generator.getID());
			x = generator.getID();
			if (!list.contains(x))
				list.add(x);
			else
				System.out.println(x);
		}
		System.out.println(list);
	}