@RunOnFxThread

@RunOnFxThread annotation offers for a convenient way to execute the target on JavaFX UI thread (JavaFX Application Thread).

Annotation can be applied at method level or at class level (to mark all methods within a class)

Example

private final VBox vBox = new VBox();

public void start(@Observes final FxPostStartupEvent event) {

    Stage = event.getPrimaryStage();

    Scene scene = new Scene(this.vBox);
    stage.setScene(scene);
    stage.show();

    try (ExecutorService executorService = Executors.newSingleThreadExecutor()) {
        executorService.submit(() -> this.showNode(this.createExpensiveNode()));
    }
}

Node createExpensiveNode() { (1)
    return new Label(LocalTime.now().toString());
}

@RunOnFxThread
void showNode(final Node node) { (2)
  this.vBox.getChildren().add(node);
}

1	`createExpensiveNode` method will be executed in a thread from executor service
2	`showNode` method will be executed on JavaFX UI thread (JavaFX Application Thread)