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Editorial Team
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Asked: 2026-06-14T01:15:27+00:00

I have a Code design question. Let me explain the scenario and then the

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I have a Code design question. Let me explain the scenario and then the question. I have 2 Panels below
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Basically, the first panel on clicking start, opens the second panel. On the Second panel when the file is chosen (background blue). That file needs to be opened in the editor pane of the first panel.

The question is: What is the good practice to do it. Both my panels are separate classes. Currently the second panel keeps a reference to the first panel. And on selection, calls the respective method of the first class to output the csv. This is a bad design anyday.
How should the children frames refresh an aspect of the parent frame?

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1 Answer

  1. Editorial Team

    • use JDialog(parent, modal) instead of JFrame, could be depends of modality

    • create JDialog only one time, reuse this container for another event came from parent

    • JDialog.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE), then every next actions are only about setVisible(true/false) wrapped in invokeLater()

    • then return (check if contents changed, changes back to the parent

    • you can to put there verifications by users action from JOptionPane("DYW to save changes ??"))

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