Javafx Nested Controller - javafx-2

Question

I have tried this nested controller stuff over and over again, but it just doesn't work for me.
I don't know why i can't get something as easy as this to work. I follow this example
<VBox fx:controller="com.foo.MainController">
<fx:include fx:id="dialog" source="dialog.fxml"/>
...
</VBox>
public class MainController extends Controller {
#FXML private Window dialog;
#FXML private DialogController dialogController;
...
}
here is my code:
app.Main.fxml
<AnchorPane prefHeight="200" prefWidth="320" xmlns:fx="http://javafx.com/fxml" fx:controller="app.MainController">
<children>
<Button layoutX="126" layoutY="90" text="Click Me!" onAction="#handleButtonAction" fx:id="button" />
<Label layoutX="126" layoutY="120" minHeight="16" minWidth="69" fx:id="label" />
<fx:include source="InnerFile.fxml" fx:id="innerfile"/>
</children>
</AnchorPane>
app.MainController.java
public class MainController {
#FXML
private Label label;
#FXML
private Button button;
#FXML
private InnerFileController controller;
#FXML
private void handleButtonAction(ActionEvent event) {
System.out.println("You clicked me!");
label.setText("Hello World!");
}
public void initialize() {
controller.here();
}
}
i'm calling a method of the nested controller ' controller.here(); ',
and get a NullPointerExecption.
I don't know what I have done wrong.

Answer 1

The name of your variable for InnerFileController is incorrect. You have:
#FXML private InnerFileController controller;
but should be:
#FXML private InnerFileController innerfileController;
This is because the name of the variable for the controller of an included file is always the fx:id value with "Controller" added on to it.