JavaFX VBox combine HBox and VBox

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {
  @Override/* ww w  .j a va 2  s.  c  o m*/
  public void start(Stage primaryStage) {
    TextField tfTextField = new TextField();
    TextField tfPrefColumnSize = new TextField();
    tfTextField.setAlignment(Pos.BOTTOM_RIGHT);
    tfPrefColumnSize.setAlignment(Pos.BOTTOM_RIGHT);
    tfPrefColumnSize.setAlignment(Pos.BOTTOM_RIGHT);
    tfTextField.setPrefColumnCount(13);
    tfPrefColumnSize.setPrefColumnCount(3);

    HBox hBox1 = new HBox(5);
    hBox1.setAlignment(Pos.CENTER);
    hBox1.getChildren().addAll(new Label("Text Field"),
            tfTextField);

    HBox hBox2 = new HBox(5);
    hBox2.setAlignment(Pos.CENTER);
    RadioButton rbLeft = new RadioButton("Left");
    RadioButton rbCenter = new RadioButton("Center");
    RadioButton rbRight = new RadioButton("Right");
    hBox2.getChildren().addAll(rbLeft, rbCenter, rbRight);
    
    ToggleGroup group = new ToggleGroup();
    rbLeft.setToggleGroup(group);
    rbCenter.setToggleGroup(group);
    rbRight.setToggleGroup(group);

    HBox hBox3 = new HBox(5);
    hBox3.getChildren().addAll(new Label("Column Size"),
            tfPrefColumnSize);

    HBox hBox4 = new HBox(15);
    hBox4.setAlignment(Pos.CENTER);
    hBox4.getChildren().addAll(hBox2, hBox3);

    VBox vBox = new VBox(5);
    vBox.getChildren().addAll(hBox1, hBox4);


    Scene scene = new Scene(vBox);
    primaryStage.setTitle("java2s.com");
    primaryStage.setScene(scene);
    primaryStage.show();

    tfPrefColumnSize.setOnAction(e -> {
      tfTextField.setPrefColumnCount(
        Integer.parseInt(tfPrefColumnSize.getText()));
    });
    
    rbLeft.setOnAction(e -> tfTextField.setAlignment(Pos.BASELINE_LEFT));
    rbCenter.setOnAction(e -> tfTextField.setAlignment(Pos.BASELINE_CENTER));
    rbRight.setOnAction(e -> tfTextField.setAlignment(Pos.BASELINE_RIGHT));
  }


  public static void main(String[] args) {
    launch(args);
  }
}