Problem With Class Hierarchy

[Dj Lalotra]

Hi All,

I am having some hard time to understand the logic behavior of the below program.
The output for this

: Compile and Execute without any errors.



interface Min{}
class A{}
class B extends A implements Min{}
class C extends B{}

public class CCExp{
public static void main(String args[]){
A a=new A();
B b=new B();
C c=new C();
Min m=null;
b=(C)m;
m=(Min)b;
A a2=(A)m;
B b2=(B)a2;
Min m2=(C)b2;
C c2=(C)m2;
}
}


Could anybody please explain the logic of the above output in really easy to understand way?

Thanks.
-DJ

[Ankit Garg]

Please Use Code Tags when you post a source code. You can edit your message using button and then add code tags to it.

This question has been asked before many times. Searching for "examlab casting" will give you these discussions

https://coderanch.com/t/469221/Programmer-Certification-SCJP/certification/casting-from-examlab
https://coderanch.com/t/451028/Programmer-Certification-SCJP/certification/examlab-reference-variable-casting

[Dj Lalotra]

Alright..Point taken.

Thanks.