JavaFx-animation-AnimationTimer

Program

Program Source

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.animation.AnimationTimer;

public class JavaFXApplication extends Application {
    
    public static void main(String[] args) {
        
       Application.launch(args);
    }
    
    public void start(Stage primaryStage) {
       
      primaryStage.setTitle("AnimationTimer");
      
      Group root = new Group();
      Scene scene = new Scene(root, 400, 400, Color.GREY); 
      
      Rectangle rect = new Rectangle();
      rect.setFill(Color.GHOSTWHITE);
      rect.setWidth(100);
      rect.setHeight(100);
      
      new AnimationTimer() {
          
          int i;
          int j;
          
          public void handle(long now) {
              
              if(rect.getBoundsInParent().getMaxX()!=400)
              {
                  rect.setTranslateX(++i);
                  rect.setTranslateY(++j);
              }
          }
          
      }.start();
      
      root.getChildren().addAll(rect);
      primaryStage.setScene(scene);
      primaryStage.show();
    }
}