public class Shelter {
    Animal[] animals = new Animal[100];  // Another common, but hateful, naming style 
    int animalCount=0;
    public void addAnimal(Animal animal) {
        animals[animalCount++]=animal;
    }
    public Animal getAnimal(int location) {
        return animals[location];
    }
    public static void main(String[] args) {
        Shelter shelter = new Shelter();  // This is a common naming stule in java, It is OK for class but I hate it
        shelter.addAnimal(new Dog());
        shelter.addAnimal(new Cat());
        Cat c = (Cat)shelter.getAnimal(1);
        System.out.println(c);
    }
}