Setting a control with a Tooltip

public class Main extends Application{

     @Override
    public void start() {
      
        Stage stage = new Stage();

        stage.setTitle("Controls Functional testing");
        stage.setWidth(500);
        stage.setHeight(500);

        final Group root = new Group();
        Scene scene = new Scene(root);
        TextBox txbox = new TextBox();
        Tooltip tt1 = new Tooltip("text box tooltip");
        txbox.setTooltip(tt1);
        vb.getChildren().addAll(txbox);


        root.getChildren().add(vb);

        stage.setScene(scene);
        stage.setVisible(true);
     }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Launcher.launch(Main.class, args);
    }

}