"Handler method not accessible" error in FXML (works only if I make method with "Event" or "ActionEvent" parameter)

I want to call handler method when any key on keyboard is pressed, and then get pressed key character. So I wrote this line for button in fxml file: ``` <Button fx:id="button" layoutX="126.0" layoutY="90.0" onKeyPressed="#handleButton" text="Test!" /> ``` When any key is pressed, this should call handleButton method in controller class and pass KeyEvent parameter to it. So I wrote this method inside it: ``` @FXML private void handleButton(KeyEvent event) { System.out.println(event); } ``` In the fxml file NetBeans shows error "Handler method is not accessible. Make public, or annotate with @FXML.", which I've already done. As soon as I change from `private void handleButton(KeyEvent event)` to `private void handleButton(Event event)` NetBeans stops showing error and app works. On this page I found answer, which uses onKeyPressed exactly the same as I do, so I'm really confused why it isn't working in my case. Thanks for your help, Vid