我正在利用Netbeans开发一个小型桌面应用程序。 我把JTree和生动地安置到一起。 现在,每件事情都会被罚款,想达到以下两点:
如何实现这两种行为?
扩大所有节点(任意深度):
for (int i = 0; i < tree.getRowCount(); i++) {
tree.expandRow(i);
}
第一页:
DefaultMutableTreeNode firstLeaf = ((DefaultMutableTreeNode)tree.getModel().getRoot()).getFirstLeaf();
tree.setSelectionPath(new TreePath(firstLeaf.getPath()));
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