是否有更好的方法来测试JTree节点是否已扩展？

I want to find a method like isNodeExpanded() to check if a given JTree node is expanded or not, but I can not find it.

我想找到像isNodeExpanded（）这样的方法来检查给定的JTree节点是否被扩展，但我找不到它。

I know I can do this by tracking the node expansion with the TreeExpansionListener. Is there a better way?

我知道我可以通过使用TreeExpansionListener跟踪节点扩展来实现此目的。有没有更好的办法？

1 个解决方案

#1

JTree.java:

JTree.java：

 /**
 * Returns true if the node identified by the path is currently expanded,
 * 
 * @param path  the <code>TreePath</code> specifying the node to check
 * @return false if any of the nodes in the node's path are collapsed, 
 *               true if all nodes in the path are expanded
 */
public boolean isExpanded(TreePath path);

Beautiful, JavaDoc :-)

美丽，JavaDoc :-)

The expanded state of a Node is not in the TreeModel but in the JTree.

Node的扩展状态不在TreeModel中，而是在JTree中。

#1