java - 如何仅扩展jtree的属性red_color = true的叶子节点

通过实现自定义CellRenderer，我有一个带有绿叶节点和红叶节点的jtree。

我这样做是为了扩展整个jtree：

expAll.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    for (int i = 0; i < jTree1.getRowCount(); i++) {
                        jTree1.expandRow(i);
                    }
                }
            });

但是如何创建一个动作来以编程方式将jtree扩展为仅具有Red单元的叶节点？

最佳答案

感谢这里的最终代码：

expFail.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
    //Exand the root node
    jTree1.expandRow(0);
    //Getting the jtree row from the root containing my red and green leaf node
    DefaultMutableTreeNode dirNode = (DefaultMutableTreeNode) jTree1.getPathForRow(2).getLastPathComponent();
    Enumeration enumDir = dirNode.preorderEnumeration();
    while (enumDir.hasMoreElements()) {
        //Walking through all nodes of dirNode
        DefaultMutableTreeNode enumDirNode = (DefaultMutableTreeNode) enumDir.nextElement();
        //If node is leaf and is red (returned by isFailed()) expand to the previous node of this leaf node
        if (enumDirNode.isLeaf() && !((LeafNodeObject) enumDirNode.getUserObject()).isFailed()) {
            jTree1.expandPath(new javax.swing.tree.TreePath(enumDirNode.getPreviousNode().getPath()));
        }
    }
}

}）;