JavaFX-如何每两秒钟刷新一次场景

Question

嗨，我想用JavaFx创建一个简单的游戏，但我有问题。我用背景和人物形象来创造这个场景。

该来源将3张人物图像随机放置在背景上。不幸的是，我无法使图像移动。

现在我想每两秒钟刷新一次场景，人会被放在新的地方。

package Game;
import java.util.Random;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.effect.BoxBlur;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Game extends Application {
    final static int h = 775;
    final static int w = 523;
    @Override
    public void start(Stage primaryStage) throws InterruptedException {
        Game x = new Game();
        Group root = new Group(x.background, x.persons);
        x.pokaz_tlo.setEffect(new BoxBlur());
        x.pokaz_tlo.setOpacity(0.9);
        primaryStage.setTitle("Good game");
        primaryStage.setScene(new Scene(root, h, w));
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }   
}
class Game{
    final static Image background = new Image(Game.class.getResource("background.jpg").toString());
    final static Image person1 = new Image(Game.class.getResource("person1.jpg").toString());
    final static Image person2 = new Image(Game.class.getResource("person2.jpg").toString());
    final static Image person3 = new Image(Game.class.getResource("person3.jpg").toString());
    ImageView show_background = new ImageView(background);
    ImageView show_person1 = new ImageView(person1);
    ImageView show_person2 = new ImageView(person2);
    ImageView show_person3 = new ImageView(person3);
    Group persons = pokaz_ukrywaj_ludzi(show_person1, show_person2, show_person3);
    public int randInt(int min, int max) {
        Random rand = new Random();
        int randomNum = rand.nextInt((max - min) + 1) + min;
        return randomNum;
    }  
    public Group pokaz_ukrywaj_ludzi(ImageView person1, ImageView person2, ImageView person3) {
        final int[] x = {164, 320, 475};
        final int[] y = {75, 270};
        person1.setTranslateX(x[randInt(0,2)]);
        person1.setTranslateY(y[randInt(0,1)]);
        person2.setTranslateX(x[randInt(0,2)]);
        person2.setTranslateY(y[randInt(0,1)]);
        person3.setTranslateX(x[randInt(0,2)]);
        person3.setTranslateY(y[randInt(0,1)]);
        Group l = new Group(person1, person2, person3);              
        return l;
    } 
}

知道吗？

Answer 1

现在问题来了：在JavaFX中，没有像Swing中那样的void to like repaint（）或validate（）。

但是你可以写下你自己的空白来刷新整个窗口。

每2秒：

new Timer().scheduleAtFixedRate(new TimerTask() {   
    public void run() {
        // Here comes your void to refresh the whole application.
    }
}, 2000, 2000);

Answer 2

您需要使用JavaFX动画定时器

http://blog.netopyr.com/2012/06/14/using-the-javafx-animationtimer/