Is it possible to extend a non-static inner class in Java?

Question

The reason I need the inner class to be non static is because I need the the inner class to have access to to a generic of the class which it is inside.

Thanks in advance.

Answer 1

I speculate that you want to extends a non-static inner class from outside an enclosing instance, which is possible.

class Alpha
{
      class Beta ( ) { }
}

class Gamma extends Alpha . Beta
{
      // important to get the constructor right or else the whole thing fails
      Gamma ( Alpha alpha )
      {
             alpha . super ( ) ;
      }
}

You can also extend the inner class inside the original enclosing class

class OuterParent
{
     class InnerParent { }

     class InnerChild1 extends OuterParent { }
}

or extend the original enclosing class and extend the inner class in the child class

class OuterChild extends OuterParent
{
     class InnerChild2 extends OuterParent { }
}

Answer 2

Yes, it is possible. It will have access to the members of the enclosing class.