How can casting sub class into other sub class in java

Question

Hey if I have a sub class named a and other sub class named b how can I casting a to b by method in test class

Answer 1

Okay.

In your test class:

public B getB(A a){

if(a instanceof B) return (B)a;

return a;
}

If you want to cast something you can do this with ().

Maybe you know that you can cast a double to int.

double num = 5.3;
int result = (int) num;

It is the same way. You only need to be careful with downcasting.
In your case: every b is also an instance of A. So you can always upcast. But not every instance of A is an instance of B.

A a = new A(); is not an instance of B. It is only an instance of favoriteGame and A.
That's why you need to check with instanceof.

Hope this helps :)

Answer 2

Just for clarification:

Test is the super class, a extends Test and b extends a?

Answer 3

thank you for helping me 🌹🌹

Answer 4

thanks for your reply ; the super class named favoriteGame