Javafx treeview随机向视图添加额外的图标

import javafx.scene.control.TreeCell;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

public class CustomTreeCell extends TreeCell<String> {
    private ImageView icon;

    public CustomTreeCell() {
        icon = new ImageView();
        icon.setFitWidth(16);
        icon.setFitHeight(16);
    }

    @Override
    protected void updateItem(String item, boolean empty) {
        super.updateItem(item, empty);

        if (empty || item == null) {
            setText(null);
            setGraphic(null);
        } else {
            setText(item);

            // 随机判断是否添加额外的图标
            if (Math.random() < 0.5) {
                Image extraIcon = new Image("path/to/extraIcon.png");
                icon.setImage(extraIcon);
                setGraphic(icon);
            } else {
                setGraphic(null);
            }
        }
    }
}

// 在使用Javafx treeview的地方
TreeView<String> treeView = new TreeView<>();
TreeItem<String> rootItem = new TreeItem<>("Root");
treeView.setRoot(rootItem);

// 设置CellFactory
treeView.setCellFactory(param -> new CustomTreeCell());