Java：展开树节点

Java：展开树节点

使用方法：SwingUtil.expandTree(tree);

public  class SwingUtil {
     public  static  void expandTree(JTree tree) {
        TreeNode root = (TreeNode) tree.getModel().getRoot();
        expandTree(tree,  new TreePath(root));
    }

     public  static  void expandTree(JTree tree, TreePath path) {
        TreeNode node = (TreeNode) path.getLastPathComponent();

         //  Go to leaf
         if (node.getChildCount() > 0) {
            Enumeration<TreeNode> children = node.children();

             while (children.hasMoreElements()) {
                TreeNode n = children.nextElement();
                TreePath newPath = path.pathByAddingChild(n);
                expandTree(tree, newPath);
            }
        }

        tree.expandPath(path);
    }
}

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