interface rule

[muks verma]

interface I {String s1 = "I";}
class A implements I {String s1 = "A";}
class B extends A {String s1 = "B";}
class C extends B {
String s1 = "C";
void printIt() {
System.out.print(((A)this).s1 + ((B)this).s1 +
((C)this).s1 + ((I)this).s1);
}
public static void main (String[] args) {new C().printIt();}
}

if interface variables implicitly become static and finale then how come in above code it is changing.

[Shaliey Gowtham]

Static members are not inherited.
The variables declared are all different variables and have no resemblence to the interface variable

[Amirr Rafique]

Hi
If a class has same varibale as defined in its parent class or Interface that it implements then the inherited variable is shadowed. So here value of interface varibale is not being changed rather it is being shadowed.

Hope it helps

[IM Mahesh]

What has been changed by the code?
What result r u expecting?

As per the rules output should be : ABCI

Don't forget that the interface variable s1 is static and hence would not be overriden by the subclasses. Therefore the subclasses will always refer to there own copy. And you are accessing it in a nonstatic way through the instance.

[muks verma]

Thanks a lot to all guys who replied very fast,now i have better understanding of overriding.