JavaFX Pane bind height/width property

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;

public class Main extends Application {
  @Override//  w  ww .  ja v a 2 s . c o m
  public void start(Stage primaryStage) {    
    // Create a pane to hold the circle 
    Pane pane = new Pane();
    
    // Create a circle and set its properties
    Circle circle = new Circle();
    circle.centerXProperty().bind(pane.widthProperty().divide(2));
    circle.centerYProperty().bind(pane.heightProperty().divide(2));
    circle.setRadius(50);
    circle.setStroke(Color.BLACK); 
    circle.setFill(Color.WHITE);
    pane.getChildren().add(circle); // Add circle to the pane


    Scene scene = new Scene(pane, 200, 200);
    primaryStage.setTitle("ShowCircleCentered");
    primaryStage.setScene(scene);
    primaryStage.show();
  }
  

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