/** Calculate the height of the subtree rooted at this node. */
public int treeHeight()
{
int height = 0;
if (this._childCount > 0)
{
SafraTreeNode it = this._oldestChild;
while (it != null)
{
SafraTreeNode cur_child = it;
int child_height = cur_child.treeHeight();
if (child_height > height)
{
height = child_height;
}
it = it._youngerBrother;
}
}
return(height + 1);
}