public void createLoginScreen() {
   Parent root = null;
   FXMLLoader loader = new FXMLLoader();
   loader.setLocation(getClass().getResource("/GraphicPack/clientLogin.fxml"));
   try {
     root = loader.load();
   } catch (IOException e) {
     e.printStackTrace();
   }
   loginStage = new Stage();
   loginStage.setTitle("LOGIN to PUBBLICACOMUNICAZIONE");
   // primaryStage.getIcons().add(new Image("/Images/server.png"));
   loginStage.setScene(new Scene(root, 255, 339));
   loginController = loader.getController();
   loginController.setClientMain(this);
   loginStage.show();
 }