JavaFX - How to get FXML Controller? [duplicate]

Answer 1

Instantiate an FXMLLoader and use an instance load method rather than a class static load method. You can then retrieve the controller instance from the loader instance.

FXMLLoader loader = new FXMLLoader(
  getClass().getResource(
    "customerDialog.fxml"
  )
);

Pane pane = (Pane) loader.load();

CustomerDialogController controller = 
    loader.<CustomerDialogController>getController();
controller.initData(customer);

For more info see:

• Passing Parameters JavaFX FXML