Java Swing — Asking for User Input (and creating a blocking thread) by popping up a JFrame

Question

My top-level container is MainFrame (JFrame). I want to be able to popup another JFrame with a JPanel that has two JTextFields from MainFrame.

Answer 1

Use a JDialog

You can set it to be modal in this JDialog(Frame, modal) constructor

Answer 2

Look into JDialog

You can extend JDialog and call super in your constructor with the second parameter set to true

super(parent, true);