@SuppressWarnings("unchecked")
public static boolean containsNegative(BagInterface<Integer> bag) {
	BagInterface<Integer> tempBag = new ArrayBag<Integer>();
	boolean status = false;
	while(!bag.isEmpty()) {
		int hold = bag.remove();
		if(hold < 0)
			status = true;
		tempBag.add(hold);
	}
	while(!tempBag.isEmpty()) {
		bag.add(tempBag.remove());
	}
	return status;
}