inner class - subclass????

[Nasir Khan]

This statement is from jxam:
"An inner class can actually be a subclass of the outer class"
Please tell me if it's correct or not.

[Junaid Bhatra]

Yes an inner class can be a subclass of the outer class. You can write a simple test program for yourself, compile it and see the results.

[Nasir Khan]

Thanks Junaid
I tried with this code
__________________________
class out {
out(){System.out.println("out constructor");}
void method(){
class inner extends out{
inner(){System.out.println("I'm in inner constructor"); }
}
new inner(); }
}

class tes extends out{
public static void main(String [] arg){
new tes().method();}
}
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As expected tes().method(); invokes out's constructor twice and inner's costructor once.
Does anyone know any advantage of extending the outer class to inner class.