import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class TestStaticScene extends Application {

    // Root of scene graph
    static Group root = new Group();

    // This must be run on the JavaFX application thread
    static Scene scene = new Scene(root, 400, 300);

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

    @Override public void start(final Stage stage) {
        System.err.println("scene = " + scene);
        Rectangle rect = new Rectangle(25, 40, 100, 50);
        root.getChildren().add(rect);
        stage.setScene(scene);
        stage.show();
    }
}