public void actionPerformed(ActionEvent e) {
   if (isExists()) {
     try {
       main.getPenerbitView().setSelected(true);
     } catch (PropertyVetoException ex) {
     }
   } else {
     main.setPenerbitView(new FramePenerbitView(main));
     main.getDesktopPane().add(main.getPenerbitView());
     main.getPenerbitView().setVisible(true);
   }
 }