How to access FX form elements from another class?

Question

Java

Tell me how to get control over the desired form FX8 element from another class.
Or is there nowhere to go beyond the borders of the controller?

Answer 1

You can get it halfway through creating the window. Not from the Stage itself, but from the FXMLLoader. And there you can already get to the elements.

FXMLLoader loader = new FXMLLoader(getClass().getResource("MyGui.fxml"));
Parent root = (Parent)loader.load();
MyController controller = (MyController)loader.getController();