如何知道某个类是否扩展了JWindow类？

Question

Is there some method how to know if class extends JWindow ? For example:

class DialogWindow extends JWindow {
}

How to check if DialogWindow class extends JWindow class? I need to know the parent Window of some component which may be placed on some JPanel which could be placed again on some JPanel , and so on on top of DialogWindow . Of course, I can pass parent instance argument to some component, but maybe there is some better way to do it?

Answer 1

Try using instanceof like this :

if(DialogWindow instanceof JWindow){//must return true in your case
...
}

Answer 2

The right way to do it is (thanks to @Ben of course :) ):

Container window = getParent();

    while(!(window instanceof JWindow)){
        window = window.getParent();
    }

JWindow parent = (JWindow) window;

System.out.println(parent.getClass());

And the output is: class ...DialogWindow Super!

Answer 3

You can try getClass().getSuperClass() . A similar question was asked here How to get the parent base class object super.getClass()