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    <p>This is how I solved the problem:</p> <pre><code>import java.util.Random; import javafx.application.Application; import javafx.application.Platform; import javafx.beans.property.SimpleDoubleProperty; import javafx.beans.value.ChangeListener; import javafx.beans.value.ObservableValue; import javafx.concurrent.Service; import javafx.concurrent.Task; import javafx.concurrent.Worker; import javafx.concurrent.Worker.State; import javafx.geometry.Insets; import javafx.scene.Group; import javafx.scene.Node; import javafx.scene.Scene; import javafx.scene.control.Label; import javafx.scene.control.ProgressBar; import javafx.scene.control.ProgressIndicator; import javafx.scene.layout.StackPane; import javafx.scene.layout.TilePane; import javafx.scene.paint.Color; import javafx.scene.shape.Rectangle; import javafx.stage.Stage; public class Minimal extends Application { private TilePane loadPane; private ProgressIndicator[] indicators = new ProgressIndicator[9]; private Label loading[] = new Label[9]; private Color[] colors = {Color.BLACK,Color.BLUE,Color.CRIMSON,Color.DARKCYAN,Color.FORESTGREEN,Color.GOLD,Color.HOTPINK,Color.INDIGO,Color.KHAKI}; private int counter = 0; @Override public void start(Stage primaryStage) throws Exception { //creating Layout final Group root = new Group(); Scene scene = new Scene(root, 400, 400); primaryStage.setScene(scene); primaryStage.setResizable(false); StackPane waitingPane = new StackPane(); final ProgressBar progress = new ProgressBar(); Label load = new Label("loading things..."); progress.setTranslateY(-25); load.setTranslateY(25); waitingPane.getChildren().addAll(new Rectangle(400,400,Color.WHITE),load,progress); root.getChildren().add(waitingPane); //Task for computing the Panels: Task&lt;Void&gt; task = new Task&lt;Void&gt;() { @Override protected Void call() throws Exception { for (int i = 0; i &lt; 20; i++) { try { Thread.sleep(new Random().nextInt(1000)); } catch (InterruptedException ex) { ex.printStackTrace(); } final double prog = i*0.05; Platform.runLater(new Runnable() { public void run() { progress.setProgress(prog); } }); } return null; } }; //stateProperty for Task: task.stateProperty().addListener(new ChangeListener&lt;Worker.State&gt;() { @Override public void changed(ObservableValue&lt;? extends State&gt; observable, State oldValue, Worker.State newState) { if(newState==Worker.State.SUCCEEDED){ loadPanels(root); } } }); //start Task new Thread(task).start(); primaryStage.show(); } private void loadPanels(Group root) { //change to loadPanel: root.getChildren().set(0,createLoadPane()); //Service: final Service&lt;Rectangle&gt; RecBuilder = new Service&lt;Rectangle&gt;() { @Override protected Task&lt;Rectangle&gt; createTask() { return new Task&lt;Rectangle&gt;() { @Override protected Rectangle call() throws InterruptedException { updateMessage("loading rectangle . . ."); updateProgress(0, 10); for (int i = 0; i &lt; 10; i++) { Thread.sleep(100); } updateMessage("Finish!"); return new Rectangle((380)/3,(380)/3,colors[counter]); } }; } }; //StateListener RecBuilder.stateProperty().addListener(new ChangeListener&lt;Worker.State&gt;() { @Override public void changed(ObservableValue&lt;? extends Worker.State&gt; observableValue, Worker.State oldState, Worker.State newState) { switch (newState) { case SCHEDULED: break; case READY: case RUNNING: break; case SUCCEEDED: Rectangle rec = RecBuilder.valueProperty().getValue(); indicators[counter].progressProperty().unbind(); loading[counter].textProperty().unbind(); loadPane.getChildren().set(counter, rec); if(counter&lt;8){ counter++; nextPane(RecBuilder); } break; case CANCELLED: case FAILED: loading[counter].textProperty().unbind(); loading[counter].setText("Failed!"); if(counter&lt;8){ counter++; nextPane(RecBuilder); } break; } } }); //begin PanelBuilding: nextPane(RecBuilder); } private void nextPane(Service&lt;Rectangle&gt; recBuilder) { loading[counter].textProperty().bind(recBuilder.messageProperty()); indicators[counter].visibleProperty().bind(recBuilder.progressProperty().isNotEqualTo(new SimpleDoubleProperty(ProgressBar.INDETERMINATE_PROGRESS))); recBuilder.restart(); } private Node createLoadPane() { loadPane = new TilePane(5,5); loadPane.setPrefColumns(3); loadPane.setPadding(new Insets(5)); for(int i=0;i&lt;9;i++){ StackPane waitingPane = new StackPane(); Rectangle background = new Rectangle((380)/3, (380)/3, Color.WHITE); indicators[i] = new ProgressIndicator(); indicators[i].setPrefSize(50, 50); indicators[i].setMaxSize(50, 50); indicators[i].setTranslateY(-25); indicators[i].setTranslateX(-10); loading[i] = new Label(); loading[i].setTranslateY(25); waitingPane.getChildren().addAll(background,indicators[i],loading[i]); loadPane.getChildren().add(waitingPane); } return loadPane; } public static void main(String[] args) { launch(args); } } </code></pre>
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