In this example, why is it still necessary to typecast an object to be sure of its type, even after getClass() has been called?

Question

I\'m following this MOOC on OOP in Java and it has presented an example I don\'t fully understand. In the example, a Book class has been created and they are const

Answer 1

You have to cast your Object-type object to Book, because you want to use getPublishingYear() and getName() functions which are specific to the Book class. The Object class does not have such methods.