Question

我在使用JavaFx的应用程序中工作，我想在我的StackPane中复制我的作曲家，并且我有错误/异常。

final Button file = new Button("fichier");
file.setGraphic(new ImageView("/images/file.png"));
final Image fichier_img = new Image("/images/file.png");
final StackPane paint = new StackPane();

 ile.setOnAction(new EventHandler<ActionEvent>() {
   public void handle(ActionEvent e) {
        File fichier = new File();
        paint.getChildren().addAll( mes_images[0]);
       //fichier.setPositionX(me.getSceneX());
    }
});
 paint.addEventHandler(MouseEvent.MOUSE_CLICKED,
    new EventHandler<MouseEvent>() {
       public void handle(MouseEvent e) {
            if (e.getButton() == MouseButton.SECONDARY)  
                menu_gauche.show(paint, e.getScreenX(), e.getScreenY());
        }
});

以下是我的错误消息：

线程中的异常＆＃34; JavaFX应用程序线程＆＃34; java.lang.IllegalArgumentException：Children：重复的孩子补充：parent = StackPane @ 658d001a at javafx.scene.Parent $ 2.onProposedChange（未知来源）at com.sun.javafx.collections.VetoableListDecorator.add（未知来源）

Answer 1

It seems that mes_images[0] is already added to the StackPane, which should not happen. Create a new Image object (I guess it is an image) and add this new instance to the StackPane then everything will be fine.

From the javadoc of Node:

A node may occur at most once anywhere in the scene graph. Specifically, a node must appear no more than once in all of the following: as the root node of a Scene, the children ObservableList of a Parent, or as the clip of a Node.

线程中的异常＆＃34; JavaFX应用程序线程＆＃34;重复的孩子补充

1 个答案: