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 dequeueDogs();
} else {
return dequeueCats();
}
}
public Animal dequeueAny() {
Dog d = dogs.peek();
Cat c = cats.peek();
if (d.isOlderThan(c)) return dequeueDog();
else return dequeueCat();
}