SwingX JXTreeTableCellRenderer搞砸了我的桌子

Question

这是我的单元格渲染器类

    public class MyCellRenderer extends DefaultTreeCellRenderer{

    ImageIcon parentbill = new ImageIcon("images/parentbill.png");

    ImageIcon childbill = new ImageIcon("images/childbill.png");

    ImageIcon parentPurchase = new ImageIcon("images/parentexpense.png");

    ImageIcon childPurchase = new ImageIcon("images/childexpense.png");

    public MyCellRenderer(TreeTableController contr){
        super();
    }
    public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
            Component c = super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
           if(leaf){

                setIcon(childPurchase);
                //((DefaultTreeCellRenderer) c).setClosedIcon(parentPurchase);
            }else{
                setIcon(parentPurchase);    
            }

            if(expanded){
                setIcon(parentPurchase);
            }

            return c;
        }
}

我有如何添加它：

    TableModel tableModel = new TableModel(root);
    JXTreeTable treeTable = new JXTreeTable(tableModel);
    treeController = new TreeTableController(tableModel, treeTable);

    MyCellRenderer cellRenderer = new MyCellRenderer(treeController);
    treeController.getTable().setTreeCellRenderer(cellRenderer);

因此，我的渲染器应该更改表中不同行的图标。 并且，他做到了（哇！）。但他混淆桌子应该放在第一个位置，他在第一个单元格中添加了一些java垃圾，如下所示： 我该如何解决？我知道，有一种方法可以在没有渲染器的情况下从JXTreeTable设置图标，但是我想根据行的类型添加一些条件，所以我必须覆盖它。