JavaFX 2.0: Add content to Tabs

package javafx_uitabpane;

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;

import javafx.stage.Stage;

/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaFX_uiTabPane extends Application {

  /**
   * @param args the command line arguments
   */
  public static void main(String[] args) {
      launch(args);
  }

  @Override
  public void start(Stage primaryStage) {
      primaryStage.setTitle("http://java-buddy.blogspot.com/");
      Group root = new Group();
      Scene scene = new Scene(root, 400, 300, Color.WHITE);
    
      TabPane tabPane = new TabPane();
      BorderPane mainPane = new BorderPane();
    
      //Create Tabs
      Tab tabA = new Tab();
      tabA.setText("Tab A");
      //Add something in Tab
      Button tabA_button = new Button("Button@Tab A");
      tabA.setContent(tabA_button);
      tabPane.getTabs().add(tabA);
    
      Tab tabB = new Tab();
      tabB.setText("Tab B");
      //Add something in Tab
      StackPane tabB_stack = new StackPane();
      tabB_stack.setAlignment(Pos.CENTER);
      tabB_stack.getChildren().add(new Label("Label@Tab B"));
      tabB.setContent(tabB_stack);
      tabPane.getTabs().add(tabB);
    
      Tab tabC = new Tab();
      tabC.setText("Tab C");
      //Add something in Tab
      VBox tabC_vBox = new VBox();
      tabC_vBox.getChildren().addAll(
              new Button("Button 1@Tab C"),
              new Button("Button 2@Tab C"),
              new Button("Button 3@Tab C"),
              new Button("Button 4@Tab C"));
      tabC.setContent(tabC_vBox);
      tabPane.getTabs().add(tabC);
    
      mainPane.setCenter(tabPane);
    
      mainPane.prefHeightProperty().bind(scene.heightProperty());
      mainPane.prefWidthProperty().bind(scene.widthProperty());
    
      root.getChildren().add(mainPane);
      primaryStage.setScene(scene);
      primaryStage.show();
  }
}