在JFXTreeTableView中添加图像

Question

我不知道如何在JFXTreeTableView中添加图像，因为当我将变量类型设置为ImageView时，出现一个错误，我应该给它String数据。这是我的类和构造函数：

class TeamsInnerClass extends RecursiveTreeObject<TeamsInnerClass> {
    ImageView icon;
    SimpleStringProperty teamName;
    ...

    public TeamsInnerClass(ImageView icon, String teamName) {
        this.icon = icon;
        this.teamName = new SimpleStringProperty(teamName);
    }
}

这是控制器：

    JFXTreeTableColumn<TeamsInnerClass, ImageView> icon = new JFXTreeTableColumn<>();
    icon.setPrefWidth(100);
    icon.setCellValueFactory(param -> param.getValue().getValue().icon);
    JFXTreeTableColumn<TeamsInnerClass, String> teamName = new JFXTreeTableColumn<>("Teams");
    teamName.setPrefWidth(100);
    teamName.setCellValueFactory(param -> param.getValue().getValue().teamName);
    ...

以及构造函数生成的数据：

    ObservableList<TeamsInnerClass> teamsInnerClass = FXCollections.observableArrayList();
    teamsInnerClass.add(new TeamsInnerClass(new ImageView(new Image("League/backs/background2.jpg")), "Real"));
    final TreeItem<TeamsInnerClass> root = new RecursiveTreeItem<>(teamsInnerClass, RecursiveTreeObject::getChildren);
    scoresTable.getColumns().addAll(icon, teamName);
    scoresTable.setRoot(root);
    scoresTable.setShowRoot(false);

和我得到的错误：