Question

Suppose I have an abstract class Person. There is another class Student which extends Person. But the Student class has a member variable, say college of type String, which is not there in Person class.

We know that we can reference a subclass from a superclass, for example,

Person p = new Student();

Will the object p have the member college?

Answer 1

You won’t be able to do p.college. However, you can cast it to Student and in this case it will have:

((Student) p).college;