JavaFX ToolBar create

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ContentDisplay;
import javafx.scene.control.Label;
import javafx.scene.control.ToolBar;
import javafx.scene.control.Tooltip;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class Main extends Application {
  //Create a label that will report the selection.
  private Label response = new Label("Menu Demo");

  public static void main(String[] args) {
    launch(args);//ww w .  j  a  v  a 2s .c om
  }
  public void start(Stage myStage) {    myStage.setTitle("Menus from java2s.com");

    // Use a BorderPane for the root node.
    BorderPane rootNode = new BorderPane();

    Scene myScene = new Scene(rootNode, 300, 300);

    myStage.setScene(myScene);

    // Create tool bar items.
    Button btnSet = new Button("Set", new ImageView("set.gif"));
    Button btnClear = new Button("Clear", new ImageView("clear.gif"));
    Button btnResume = new Button("Resume", new ImageView("resume.gif"));

    // Turn off text in the buttons.
    btnSet.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
    btnClear.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
    btnResume.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);

    // Set tooltips.
    btnSet.setTooltip(new Tooltip("Set a breakpoint."));
    btnClear.setTooltip(new Tooltip("Clear a breakpoint."));
    btnResume.setTooltip(new Tooltip("Resume execution."));

    // Create the tool bar.
    ToolBar toolBar = new ToolBar(btnSet, btnClear, btnResume);    rootNode.setCenter(response);

    rootNode.setTop(toolBar);
    
    myStage.show();
  }
}