🚀 go-pugleaf

Hi folks, I have an application that creates successive frames. I would like
to go backwards, that is make frames disappear and call back previous frames
and then go forward to the frame I just made disappear. I know I can do this
by
frame.setVisible(false);
however, if I use the same button that originally created the frame, it will
create a new frame which is not what I want, I want the old frame back.
I think what I need is a method to test whether I have created a certain
frame or not. This way I won't create it anew if it already exists.
What about it boys?
Jacques