Interface is static???

[RAGU KANNAN]

Hello,

For the following question there answer's are "A" and "E". But it looks "B" also correct.The whizlab says wrong because the interface is internally static. I read K&B book says interfaces are internally public and abstract. So I couldn't understand, pls explain to me.

Thanks, Raghu.K

    
Question :- 
class TestInner{ //1
private static int i = 10; //2
private static voidf(){system.out.println(i);}//3
TestInner(){System.out.print("Outer");}//4
class MyInner{//5
//6 insert code here
MyInner(){System.out.print("Inner"+i);}//7
void g(){f();}
}
public static void main(String args[]){
new TestInner().new MyInner();
}
}
 
Answer :- 
[A]   class I{}
[B]   interface J{}
[C]   static class I{} 
[D]   static Interface J{} 
[E]   final Integer i = new Integer(10);

[Dave Casman]

The answer is, you get a compile error at line 3.

    
private static voidf(){system.out.println(i);}//3

Your voidf method does not have a return type. What was the question?

[Meena R. Krishnan]

First of all, at line 3 there is a typo, there should be a space between void and f().


As far as the option B, I just compiled it and with B at line 6 and got an error saying

"The member interface J can only be defined inside a top-level class or interface"

[RAGU KANNAN]

Thanks Krishnan, for correcting the "TYPO"

Dave,
My Question is why answer [B] "Interface J{}" is not allowing in Inner class?

Thanks, Raghu.K

[Meena R. Krishnan]

There is no such thing as an inner interface. Because, interfaces are always implicitly static. They are always top-level, not inner. Inner classes cannot have any static modifiers at all.

from --> http://www.developer.com/java/article.php/859381

[Aniket Patil]

From JLS:

"Inner classes may not declare static members, unless they are compile-time
constant fields" and

"Member interfaces are always implicitly static so they
are never considered to be inner classes."

Interfaces are not implicitly public, unless you declare them to be.
[ September 17, 2006: Message edited by: Aniket Patil ]