How to make Loading Scene before application window in javaFx?
<p>I am triying to create a loading window before real application window openning. There is a progressBar in the loading scene and it is undeterminate.</p>

<p>Problem is that; progressbar does not work until the real window open when i execute the program.</p>

<p>by the way i tried preloader class, but also not works too.</p>

<p>here is my code;</p>

<pre><code>public class MainApp2 extends Application {


    private Stage loadingStage = new Stage();

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


    public void start(final Stage mainStage) throws Exception {

        //loading..
        loadingScreen();

        //start...
        appScreen();

    }


    private void loadingScreen() {

        ProgressBar bar = new ProgressBar(ProgressIndicator.INDETERMINATE_PROGRESS);
        bar.setPrefWidth(300);
        bar.setPrefHeight(200);

        loadingStage.initStyle(StageStyle.TRANSPARENT);
        loadingStage.initStyle(StageStyle.UNDECORATED);
        loadingStage.setScene(new Scene(bar));
        loadingStage.show();

    }


    private void appScreen() {

        new Task&lt;Void&gt;() {
            @Override
            protected Void call() throws Exception {

                Stage mainStage = new Stage();

                //get real window
                Scene root = new Scene(new MyAppWindow().getAppWindow());
                mainStage.setScene(root);
                mainStage.centerOnScreen();
                mainStage.show();

//                loadingStage.close();

                return null;
            }
        }.run();

    }

    public class MyAppWindow {

        public BorderPane getAppWindow(){

            System.out.println("may be initialize take a long time...");
            for (int i = 0; i &lt; 90000000; i++) {
                System.out.print("");
            }

            return new BorderPane(new Label("Here is real application Window!"));
        }


    }


}
</code></pre>