Method dequeueAny

java/Chapter 3/Question3_7/AnimalQueue.java:20–33

()

	}
	
	public Animal dequeueAny() {
		if (dogs.size() == 0) {
			return dequeueCats();
		} else if (cats.size() == 0) {
			return dequeueDogs();
		}
		Dog dog = dogs.peek();
		Cat cat = cats.peek();
		if (dog.isOlderThan(cat)) {
			return dogs.poll();
		} else {
			return cats.poll();
		}
	}
	
	public Animal peek() {
		if (dogs.size() == 0) {