Desktop app - creating and destroying forms/frames dynamically.

Hi all,
I'm creating a small crypto app for the desktop using java.
I'm using JFrames (import javax.swing.JFrame) with Oracle JDeveloper 11g under Linux.
I want to have a "welcome" form/frame where users can choose their encryption method,
and then on choosing the method, I want to dynamically create the appropriate form for
the chosen encryption method and also destroy/free/dispose() of the welcome form.
When the user has finished their encrypting, they should close the frame/form (either by
clicking on the x at the top right - or using the Exit button or by any method) and the
welcome frame should be dynamically recreated and appear.
I've tried various things - btnEncode_actionPerformed(ActionEvent e) then
this.dispose() - and I've fiddled with this_windowClosed(WindowEvent e) and
dispose(), but nothing seems to work.
Even a workaround using setVisibl(true/false) would be acceptable at
this stage - this has been wrecking my head all day. It's very easy to do in Delphi!
TIA and rgs,
Paul...

What do you mean that "nothing seems to work"? What does it do instead?
Post a small piece of runnable code that demonstrates the problem, and we'll go from there.

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