Question

I have a class A and class B which extends A and is a subclass. Now i have

A aObject = new A(); and
A bObject = new B();

Now can i call the method in class B which is not in A using bObject without typecasting ?

If we cant do so without typecasting, what is the advantage of polymorphism then?

Thanks.

Answer 1

No, you cannot. On both objects aObject and bObject you can call only methods that are defined for A without using casting.

If you defined bObject to be of type B, then you could, but as your code stands you can only work with A‘s methods and members.