public static void main(String args[]) { System.out.println("AnimalShelter Sample"); AnimalQueue a = new AnimalQueue(); a.enqueue(new Dog("Anthar")); a.enqueue(new Dog("Cobo")); a.enqueue(new Dog("Simon")); a.enqueue(new Cat("Cochino")); Animal an = (Animal) a.dequeueAny(); System.out.println(an.name); an = (Animal) a.dequeueCat(); System.out.println(an.name); }