java.lang.ClassException: A cannot be cast into B

Question

I implemented this code:

class A {
    //some code
}
class B extends A {
    // some code
}

class C {
    public static void main(String []args)
    {
              


        

Answer 1

When B extends A, it means all methods and properties of A are also present in B.

So you can ever cast B to A,

but you CANNOT cast A to B.

You have to be really care about casting in your application.