Some Scene examples

A basic application frame :

package scenegraphdemo;
 
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
 
public class Main extends Application {
 
   @Override
   public void start(Stage stage) {
       Group root = new Group();
       Scene scene = new Scene(root, 500, 500, Color.BLACK);
       stage.setTitle("JavaFX Scene Graph Demo");
       stage.setScene(scene);
       stage.show();
   }
 
   public static void main(String[] args) {
       launch(args);
   }
}

Adding a leaf node :

package scenegraphdemo;
 
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
 
public class Main extends Application {
 
   @Override
   public void start(Stage stage) {
       Group root = new Group();
       Scene scene = new Scene(root, 500, 500, Color.BLACK);
 
       Rectangle r = new Rectangle(25,25,250,250);
       r.setFill(Color.BLUE);
       root.getChildren().add(r);
 
       stage.setTitle("JavaFX Scene Graph Demo");
       stage.setScene(scene);
       stage.show();
   }
 
   public static void main(String[] args) {
       launch(args);
   }
}

Animating the scene :

package scenegraphdemo; 
 
import javafx.animation.FillTransition; 
import javafx.application.Application; 
import javafx.scene.Group; 
import javafx.scene.Scene; 
import javafx.scene.paint.Color; 
import javafx.scene.shape.Rectangle; 
import javafx.stage.Stage; 
import javafx.animation.Timeline; 
import javafx.animation.ParallelTransition; 
import javafx.animation.RotateTransition; 
import javafx.animation.ScaleTransition; 
import javafx.animation.TranslateTransition; 
import javafx.util.Duration; 
 
public class Main extends Application { 
 
    @Override 
    public void start(Stage stage) { 
        Group root = new Group(); 
        Scene scene = new Scene(root, 500, 500, Color.BLACK); 
        Rectangle r = new Rectangle(0, 0, 250, 250); 
        r.setFill(Color.BLUE); 
        root.getChildren().add(r); 
 
        TranslateTransition translate = 
        new TranslateTransition(Duration.millis(750)); 
        translate.setToX(390); 
        translate.setToY(390); 
 
        FillTransition fill = new FillTransition(Duration.millis(750)); 
        fill.setToValue(Color.RED); 
 
        RotateTransition rotate = new RotateTransition(Duration.millis(750)); 
        rotate.setToAngle(360); 
 
        ScaleTransition scale = new ScaleTransition(Duration.millis(750)); 
        scale.setToX(0.1); 
        scale.setToY(0.1); 
 
        ParallelTransition transition = new ParallelTransition(r, 
        translate, fill, rotate, scale); 
        transition.setCycleCount(Timeline.INDEFINITE);
        transition.setAutoReverse(true); 
        transition.play(); 
 
        stage.setTitle("JavaFX Scene Graph Demo"); 
        stage.setScene(scene); 
        stage.show(); 
    } 
 
    public static void main(String[] args) { 
        launch(args); 
    } 
}