Newbie: should I use a JDialog or JPanel ?

I have inherited an app that is 50% complete and I need to add a new popup window that is displayed in response to a Pulldown menu selection.
The popup window will have 5 different text fields that will need to be passed back to the calling routine.
In the source code that I inherited, similar windows are created using a JDialog and sometimes using a JPanel (and I can't figure out why).
What are the upsides and downsides for choosing JDialog over JPanel ?
Thank you

This is a question of convenienve vs. reusability.
If you inherit your component from JDialog, it will be easy to set up the infrastructure:
- Return closes dialog:
rootPane().setDefaultButton(yourButton)- Closing triggers your code:
this.addWindowListener(myWindowListener}- Menu needed:
this.setJMenuBar(myMenuBar) - ...
But the downside is, that you can't reuse your component (possibly together with other components) inside a JFrame.
Sven

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> Hey, I am having trouble figuring out if I should be
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> similar to the BBC site:
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... I am shocked and horrified to learn that the latest iMovie does not even set chapter markers!
.. I am looking into 2 possibilities, Adobe Premiere elements 12, or.........Final Cut Pro X.
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Newbie: should I use a JDialog or JPanel ?

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