class MessageAction implements ActionListener {

    public void actionPerformed(ActionEvent evt) {<FILL_FUNCTION_BODY>}

}

        String message = "Unspecified message";
        if (RupsMenuBar.ABOUT.equals(evt.getActionCommand())) {
            message = "RUPS is a tool by 1T3XT BVBA.\nIt uses iText, a Free Java-PDF Library.\nVisit http://www.1t3xt.com/ for more info.";
        } else if (RupsMenuBar.VERSION.equals(evt.getActionCommand())) {
            message = "iText version: " + Document.getVersion();
        }
        JOptionPane.showMessageDialog(null, message);
    
<no_super_class>