JavaFX : Adding a new node to Scene in java code when Scene is initially loaded from FXML

Question

How can I add a new node to the Scene in java code when Scene is initially loaded from FXML ? I have loaded from FXML as shown below

Parent root = FXMLLoader         


        

Answer 1

Here is one way to do this:

((VBox) root).getChildren().add(new Button("Java Button"));

The snippet above assumes that the top container defined in your FXML is a VBox, if it is not a VBox, just cast it to whatever type you have chosen.

I wonder how I can determine the type of the container at runtime, so I can write a more generic code.

The type is likely a Pane, so casting to a Pane will work in most cases. Using a layout Pane as a Parent is usually recommended for most layout tasks in JavaFX.