JOptionPane doesn't work correct in JPanel

Question

In my game, when I create a JOptionalPane, after I click on the "Ok" button, it draws the dialog over the panel. Below are pictures of the error.

JOptionPane before the error:

JOptionPane after the error, after click on the button "Yes"

The JOptionPane is created from class who extends from JComponent, in this line of code:

JOptionPane.showConfirmDialog(getParent().getParent(),
        "The end! Lifes = 0");

Answer 1

I suspect that your panel's implementation of paintComponent() fails to invoke super.paintComponent(), as shown in this Q&A.