adding jbutton to instance of a class that extends JPanel

yes you can do that

panel.add(button);

It is not working  ..

need more information :)

I am setting the frame layout to be null

do I need to something with panel layout too ? I just setting its size and position .. I think that should do .. as I am doing likewise in other programs so far.. and it works .

what have you overridden in JPanel( paint/paintComponent...? )

>>I am setting the frame layout to be null

using layouts are the recommended approach!

you need to revalidate() the panel
and nake sure you are overriding paintComponent() and *not* the paint() method

>>you need to revalidate() the panel

unless you add the component at runtime, you don't have to call this!

>> do I need to something with panel layout too ?
yes, you have to do this with the panel too

@objects .. sorry but I did not get you
@KSiv  thanks I did not knew that
@Valeri can you plz plz give example what do you mean by that

1. have you added the panel to your jframe?
2. are you sure that button is created? I mean is it not null?
3. could you please print getBounds() of the button and to see where it's placed?

whenever you change the layout of a visible container you need to let the container know that it needs to redo its layout

eg.


panel.add(button);
panel.revalidate();
panel.repaint();

And if panel is a subclass then you need to make sure you have not overridden paint()

Hi everyone .. thanks for such good responses

@Valeri .. yes I will try your advice now.

@Objects .. can you please elaborate on  why " if panel is a subclass then you need to make sure you have not overridden paint()" ??