JavaFx - 在TabPane中关闭选项卡不会释放内存

Question

问题是当删除旧标签时，它似乎不是垃圾收集。

这是一个简单的例子

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

@Override
public void start(Stage stage) throws Exception {
    stage.setTitle("Tabs example");

    // create window holder        
    final TabPane tabPane = new TabPane();
    tabPane.setSide(Side.BOTTOM);
    tabPane.setTabClosingPolicy(TabPane.TabClosingPolicy.SELECTED_TAB);    
    tabPane.getTabs().add(new Tab("First Tab"));

    // create buttons
    Button add = new Button("Add Tab");
    Button remove = new Button("Remove Tab");


    HBox hBox = new HBox(8);       
    hBox.getChildren().add(add);
    hBox.getChildren().add(remove);

    add.setOnAction(new EventHandler<ActionEvent>() {

        @Override
        public void handle(ActionEvent t) {
            tabPane.getTabs().add(new Tab("New Tab"));
        }
    });

    remove.setOnAction(new EventHandler<ActionEvent>() {

        @Override
        public void handle(ActionEvent t) {                
            if (!tabPane.getSelectionModel().isEmpty()){
                tabPane.getTabs().remove(tabPane.getSelectionModel().getSelectedIndex());
            }
        }
    });        


    BorderPane borderPane = new BorderPane();
    borderPane.setCenter(tabPane);
    borderPane.setTop(hBox);

    // add components to screen
    Group root = new Group();
    Scene scene = new Scene(root);

    borderPane.setPrefSize(500, 500);

    root.getChildren().add(borderPane);        
    stage.setScene(scene);        
    stage.centerOnScreen();
    stage.show();
}

问题是：当我决定关闭标签时，除了remove（）之外，我还想做更多的事情吗？或者这仅仅是内存泄漏？

谢谢，