Question

我正在使用javaFX，我想从一个单独的玩家类向游戏根目录添加Rectangle对象。为此，我在游戏中创建了一个getRoot函数，并尝试从播放器类中添加矩形。尽管出于某种原因它只是起作用了。

public class Test {
    public void run() {
        System.out.println("loaded");
        GameScene gameScene = new GameScene();
        gameScene.getRoot().getChildren().add(new Sprite(50,50,50,50, Color.GREEN,"TEST", 1, 0));
    }
}

public class GameScene {

    private Group root = new Group();

    public Scene getScene(){

        Scene scene = new Scene(root, Color.BLACK);
        Test test = new Test();
        test.run();

        return scene;
    }

    public Group getRoot() {
        return root;
    }

}

运行“ gameScene”仍然是空的，尽管“已加载”字符串已打印到控制台。

Answer 1

尝试通过其他类修改根目录：

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 GameScene extends Application {

    private Group root;
    @Override
    public void start(Stage stage) {
        root = new Group();
        stage.setScene(getScene());
        stage.show();
    }

    public Scene getScene(){

        Scene scene = new Scene(root);
        Test test = new Test();
        test.run(root);
        return scene;
    }

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

class Test {

    public void run(Group root) {
        root.getChildren().add(new Rectangle(50, 50, Color.BLACK));
    }
}

不能添加到单独班级的根？

1 个答案: