Tutorial JavaFX code

//create a Pane et graph scene root for the 3D cont
        Group root3D = new Group();
        Pane pane3D = new Pane( root3D);
//Create cube shape
        Box cube = new Box(1, 1, 1);
//Create Material
        final PhongMaterial blueMaterial = new PhongMaterial();
        blueMaterial.setDiffuseColor(Color.BLUE);
        blueMaterial.setSpecularColor(Color.BLUE);
//Set it to the cube
        cube.setMaterial(blueMaterial);
        //Add the cube to this node
        root3D.getChildren().add(cube);
        //a camera group
        PerspectiveCamera camera = new PerspectiveCamera(true);
        Group cameraGroup = new Group(camera);
        root3D.getChildren().add(cameraGroup);
        //ate then move the camera
        Rotate ry = new Rotate();
        ry.setAxis(Rotate.Y_AXIS);
        ry.setAngle(-15);
        Translate tz = new Translate();
        tz.setZ(-10);
        tz.setY(-1);
        cameraGroup.getTransforms().addAll(ry,tz);
// Add point light
        PointLight light = new PointLight(Color.WHITE);
        light.setTranslateX(-180);
        light.setTranslateY(-90);
        light.setTranslateZ(-120);
        light.getScope().addAll(root3D);
        root3D.getChildren().add(light);
// Create scene
        Scene scene = new Scene(pane3D, 600, 600, true);
        scene.setCamera(camera);
        scene.setFill(Color.GREY);
//Add the scene to the stage and show it
        primaryStage.setTitle("Cubes Test");
        primaryStage.setScene(scene);
        primaryStage.show();
        primaryStage.show();