Lets say that I have the following code:

public class Shelter<A extends Animal, B extends Animal>
{
     List<A> topFloor = new Vector<A>();
     List<B> bottomFloor = new Vector<B>();

     public A getFirstTopFloorAnimal(){return topFloor.firstElement();}
     public B getFirstBottomFloorAnimal(){return bottomFloor.firstElement();}

     //This compiles but when I try to use it, it only returns objects
     public List<Animal> getAnimals()
     { 
         Vector a = new Vector(topFloor); 
         a.addAll(bottomFloor); 
         return a;
     }
}

Now for somereason the following code compiles. But when I try to use getAnimals() I get a of objects instead of Animal. Any ideas why this is? Does this have to do with the List is NOT a List idea in the Generics tutorial?

Thank you.