public void exit() {
// user is attempting to exit the interpreter.
// make sure this is what they want to do
// and check if changes need to be saved.
int r =
JOptionPane.showConfirmDialog(
this,
new JLabel("Exit Interpreter?"),
"Confirm Exit",
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE);
if (r == JOptionPane.YES_OPTION) {
// user still wants to go ahead.
// if file not saved then prompt to check
// whether it should be.
if (!dirty || checkForSave()) {
System.exit(0);
}
}
}
