在JavaFX应用程序顶部显示AnchorPane

我的主应用程序运行在一个具有多个选项卡的

JFXTabPane

中。
在特殊情况下，我想在整个应用程序的顶部加载另一个

AnchorPane

RootController.java

JFXTabPane tabPane = new JFXTabPane();

tab = new Tab("Tab 1");
tabPane.getTabs().add(tab);

borderPane.setCenter(tabPane);
loader = new FXMLLoader(getClass().getClassLoader().getResource("fxml1.fxml"));
parent = loader.load();
tab.setContent(parent);
Controller controller = loader.getController();

/* ... Loading more tabs ... */


/* Loading the additional `AnchorPane`, that needs to be loaded at a later point */
AnchorPane pane = FXMLLoader.load(getClass().getClassLoader().getResource("fxml2.fxml"));

Pane pane;

/* Registering that AnchorPane in the Controller */
public void setPane(Pane p) {
    this.pane = p;
}

Fxml1Controller.java

JFXTabPane tabPane = new JFXTabPane();

tab = new Tab("Tab 1");
tabPane.getTabs().add(tab);

borderPane.setCenter(tabPane);
loader = new FXMLLoader(getClass().getClassLoader().getResource("fxml1.fxml"));
parent = loader.load();
tab.setContent(parent);
Controller controller = loader.getController();

/* ... Loading more tabs ... */


/* Loading the additional `AnchorPane`, that needs to be loaded at a later point */
AnchorPane pane = FXMLLoader.load(getClass().getClassLoader().getResource("fxml2.fxml"));

Pane pane;

/* Registering that AnchorPane in the Controller */
public void setPane(Pane p) {
    this.pane = p;
}

我的方法是将窗格设置为可见，并在需要时将其置于前面：

private void showPane(ActionEvent event) {
    pane.setVisible(true);
    pane.toFront();
    System.out.println(pane);
}

但这并没有改变任何事情

---

那么，如何在我的

JFXTabPane

顶部显示

ancorpane

？

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