valid inner classes

[Anshuman Acharya]

there is this problem in km's mock exam:
class A {
protected int i;
A(int i) {
this.i = i;}}
Which of the following would be a valid inner class for this class?
and it says that this answer would be wrong-
class B {
B() {
System.out.println("i = " + i);}}
the reason given is-
this implicitly invokes the no-args constructor, which A does not define.
i say, it doesn't! A is not the super of B, and we can very well instantiate B like this:
A.B b = new A(15).new B();
am i wrong?

[bill bozeman]

I would agree with you, I am going to try it out to make sure.
Bill

[bill bozeman]

Yep, it worked. I tried the following code:

class A
{
    protected int i;
    A(int i)
    {
       this.i = i;
    }
    
    class B
    {
        B()
        {
            System.out.println("i = " + i );
        }
    }
    
    public static void main( String args[] )
    {
        A.B b = new A( 15 ).new B();
    }
}

And it compiled and ran fine. They are confusing subclass with inner classes and inner classes do not call the constructor of the subclass implicitly like subclasses do.
Bill

[Anshuman Acharya]

thanx bill... i also compiled the code and it worked.