How to call functions on the stage in JavaFX's controller file

Question

I am using javafx along with fxml, so I use the controller for the real coding. I need to do a few operations on the stage, such as getting

Answer 1

With *.FXML files and Controllers and not with Main or Events , use this :

@FXML private Stage stage;
stage = (Stage) elemen.getScene().getWindow();

element, can be any control or element in you FXML, in my case is an AnchorPane:

@FXML  private AnchorPane element;