Why reference variable of type object must be cast when used as other object type

Question

Although all classes in Java are sub-classes of Object class, but different from other object types, a reference variable of type Object can\'t be assigned to any other refe

Answer 1

Once you've assigned tiger to an Object reference, the compiler no longer knows that it's actually a Tiger. All it knows is that the tiger object is an Object -- it might be a String, Integer, Fruitcake, or Animal.

This is exactly how it's supposed to work.