JavaFX设置imageview后等待

Question

I need to wait after setting an Imageview, but if I use

Thread.sleep(1000)

after setting the imageView the whole application sleeps for one second but the imageView will not be set during this period of time.

I would like to know how can I pause the whole application after setting the imageview.

For instance, it's a game of cards (briscola), and after the computer played a card, or I played a card the application should pause to show which cards are on the plate and who won the hand.

Thanks in advance.

UPDATE: This is what I tried with the tasks, with no success as the images

    private void setImages(BriscolaModel model) {
    Set<Map.Entry<Player, BriscolaCard>> entries = model.getPlate().entrySet();


    // set images

    Task<Integer> task = new Task<Integer>() {
        @Override protected Integer call() throws Exception {
            for(Map.Entry<Player, BriscolaCard> entry : entries){
                plate.getImageViews().add(new ImageView(new Image(getClass().getClassLoader().getResourceAsStream(entry.getValue().getRelativePath()),200,100,true, false)));
            }
            plate.getCards().getChildren().setAll(plate.getImageViews());
            return 0;
        }
    };

    Thread th = new Thread(task);
    th.start();

    // clear images 

    Task <Integer> clearTask = new Task<Integer>() {
        @Override
        protected Integer call() throws Exception {
            clearImages();
            return 0;
        }
    };
    Thread clearThread = new Thread(clearTask);
    if(entries.size()==2){
        Platform.runLater(clearTask);
    }else {
        clearThread.start();
    }
}

2nd UPDATE:

This seem to work better (i randomly see the images for some milliseconds before being cleared), but how can I set the minimum time to wait before the Platform.runLater() ?

private void setImages(BriscolaModel model) {
    Set<Map.Entry<Player, BriscolaCard>> entries = model.getPlate().entrySet();

    for (Map.Entry<Player, BriscolaCard> entry : entries) {
        plate.getImageViews().add(new ImageView(new Image(getClass().getClassLoader().getResourceAsStream(entry.getValue().getRelativePath()), 200, 100, true, false)));
    }
    plate.getCards().getChildren().setAll(plate.getImageViews());

    Task<Void> waitTask = new Task<Void>() {
        @Override
        protected Void call() throws Exception {
            clearImages();
            return null;
        }
    };

    if(entries.size() == 2){
        Platform.runLater(waitTask);
    }

}

Answer 1

I found the solution, thanks to Rahul Singh for the suggestions!

private void setImages(BriscolaModel model) {
    Set<Map.Entry<Player, BriscolaCard>> entries = model.getPlate().entrySet();
    plate.getImageViews().clear();

    for (Map.Entry<Player, BriscolaCard> entry : entries) {
        plate.getImageViews().add(new ImageView(new Image(getClass().getClassLoader().getResourceAsStream(entry.getValue().getRelativePath()), 200, 100, true, false)));
    }
    plate.getCards().getChildren().setAll(plate.getImageViews());

    Task<Void> waitTask = new Task<Void>() {
        @Override
        protected Void call() throws Exception {
            Timeline timeline = new Timeline(new KeyFrame(
                    Duration.millis(2000),
                    ae -> clearImages()));
            timeline.play();
            return null;
        }
    };

    if(entries.size() == 2){
        Platform.runLater(waitTask);
    }

}