How much Java can you put In an FXML document ?

Hi.
Sorry If the question Is worded Incorrectly.
Below Is a small javafx prog.

public class FXApplication2 extends Application { @Override public void start(Stage stage) throws Exception { Parent root = FXMLLoader.load(getClass().getResource("fxapplication2.fxml")); stage.setTitle("Hello MVC"); Scene scene = new Scene(root,300,275); stage.setScene(scene); scene.getStylesheets().add(FXApplication2.class.getResource("Login.css").toExternalForm()); stage.show(); } public static void main(String[] args) { launch(args); } }


My question Is , can I Just enter the following line:
Parent root = FXMLLoader.load(getClass().getResource("fxapplication2.fxml"));
and place the Stage and Scene commands In the FXML file ?