How to know if some class extends JWindow class?

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?

But if I have for example `DialogWIndow_1`, `DialogWindow_2`,... then I have to compare to every one of them, which is I do not want to do. — Ernestas Gruodis, Aug 28 '13 at 17:23

score 2 · Answer 1 · answered Aug 28 '13 at 17:24

2

Try using instanceof like this :

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

answered Aug 28 '13 at 17:24

Ben

103
1
7

Yes, definitely, that was the answer. Thanks @Ben – Ernestas Gruodis Aug 28 '13 at 17:30

Ernestas Gruodis · Answer 2 · 2013-08-28T17:44:00.053

1

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!

edited Aug 28 '13 at 17:44

answered Aug 28 '13 at 17:36

Ernestas Gruodis

8,567
14
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117

score 0 · Answer 3 · edited May 23 '17 at 11:57

0

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

edited May 23 '17 at 11:57

Community

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1

answered Aug 28 '13 at 17:23

Stephan Mc Lean

11
2

How to know if some class extends JWindow class?

3 Answers3