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Better explanation. I stand by my previous comments. Use a modal JDialog instead of a JFrame to collect and return data from the user before continuing.

User interfaces that are children of a main JFrame interface are not typically also JFrames. This is because the modality of JFrames cannot be changed from modeless. However, you can do everything...

You might also consider using CardLayout to change the user interface rather than adding and removing components to a single container. It's much simpler, cleaner, and will result in fewer...