🚀 go-pugleaf

I'm kind of a newbie to Java.  Anyway I was writing a couple of programs
that display information in the JOptionPane.showMessageDialog.  I was
wondering how I access the Cancel button and tell the Dialog to do something
else if the Cancel button is pressed. I notice that when I press the Cancel
button in my applications that it terminates but a bunch of exceptions are
thrown in the execution log.

Any help would be appreciated.  This is probably an easy one for you pros.