How to add listener to ok button in JOptionPane?

Question

How to add a listener when you click OK in JOptionPane.INFORMATION_MESSAGE .

My JOptionPane:

 JOptionPane.showMessageDialog(null, "Your password is: " + password, "Your Password", JOptionPane.INFORMATION_MESSAGE); 

Answer 1

The showMessageDialog method returns void when the user closes or clicks ok. But you can use the JOptionPane.showOptionDialog method with a single DEFAULT_OPTION for the OK button. showOptionDialog will return 0 if it clicked OK and -1 if the user closed the dialog.

 int res = JOptionPane.showOptionDialog(null, "Hello", "Test", JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE, null, null, null); System.out.println(res); 

You don't need a listener because javadoc says:

Each showXxxDialog method blocks the caller until user interaction is complete.

Answer 2

When the JOptionPane button is pressed, it returns the index value of the button. By checking the value, you can find out if the Ok button is pressed or not.