inner class

[vijay Thiru]

Hi all,

class outer {
abstract class inner{
abstract void show();
}

}
if inner class is abstract.
how to extends abstract inner class.

[marc weber]

Here are a couple of ways...

class Outer {
  abstract class Nested {
    abstract void show();
  }
  
  class NestedExt extends Nested {
    void show() {
      System.out.println("Showing...");
    }
  }
  
  public static void main(String[] args) {
    Outer.Nested nest = new Outer().new NestedExt();
    nest.show();
    Other.Nested otherNest = new Other().new OtherNest();
    otherNest.show();
  }
}
 
class Other extends Outer {
  class OtherNest extends Nested {
    void show() {
      System.out.println("Showing other...");
    }
  }
}

[vijay Thiru]

thanks marc weber,
my understanding is outer class can not extends the abstract inner class.
so the inner class only can extends abstract inner class.
correct me if i am wrong.