帮我用Java完整实现这段代码：Group root = new Group(); Scene scene = new Scene(root, 400, 400, true, SceneAntialiasing.BALANCED); Box box = new Box(200, 200, 200); PhongMaterial material = new PhongMaterial(); material.setDiffuseColor(Color.BLUE); box.setMaterial(material); root.getChildren().add(box); PerspectiveCamera camera = new PerspectiveCamera(); camera.setTranslateX(-200); camera.setTranslateY(-200); camera.setTranslateZ(-500); scene.setCamera(camera); Stage stage = new Stage(); stage.setScene(scene); stage.show();

当然，我可以帮你实现这段代码。这段代码使用 JavaFX 库创建了一个 3D 场景，其中包含一个蓝色的立方体。以下是完整的 Java 代码：

import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.paint.Color;
import javafx.scene.paint.PhongMaterial;
import javafx.scene.shape.Box;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;

public class Main extends Application {

@Override
public void start(Stage primaryStage) throws Exception {
Group root = new Group();
Scene scene = new Scene(root, 400, 400, true, SceneAntialiasing.BALANCED);
Box box = new Box(200, 200, 200);
PhongMaterial material = new PhongMaterial();
material.setDiffuseColor(Color.BLUE);
box.setMaterial(material);
root.getChildren().add(box);
PerspectiveCamera camera = new PerspectiveCamera();
camera.setTranslateX(-200);
camera.setTranslateY(-200);
camera.setTranslateZ(-500);
scene.setCamera(camera);
primaryStage.setScene(scene);
primaryStage.show();
}

public static void main(String[] args) {
launch(args);
}
}

希望这可以帮到你！