JavaFX StackPane handle mouse released event

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

public class Main extends Application {
   @Override/*  w  w w  . j  ava  2 s  . c o m*/
   public void start(Stage primaryStage) {
      // Create a Stack pane
      StackPane pane = new StackPane();

      // Create a circle and set its properties
      Circle circle = new Circle(50);
      circle.setFill(Color.WHITE);
      circle.setStroke(Color.BLACK);
      pane.getChildren().add(circle);

      // Create and register the handler
      pane.setOnMousePressed(e -> {
         circle.setFill(Color.BLACK);
      });

      pane.setOnMouseReleased(e -> {
         circle.setFill(Color.WHITE);
         circle.setStroke(Color.BLACK);
      });

      // Create a scene and place it in the stage
      Scene scene = new Scene(pane, 120, 120);
      primaryStage.setTitle("java2s.com");
      primaryStage.setScene(scene);
      primaryStage.show();

   }
}