Lack of Generic Tree support

I am wondering how people feel about the lack of the Tree type in Java? I find the Java types pretty weak generally, but at least there are several Set, Map, List implementation to choose from. There is no Tree, or perhaps there are too many. There is the UI tree classes (in swing), the Preference class has a tree like interface, JNDI, etc.
I am wondering if this is a problem for others? We ended up creating our own Tree interface and implementations.
Pat O

Have you looked at the DefaultMutableTreeNode? Ifso, what is lacking in your opinion?
It's Swing. I've used JVMs on headless Linux boxes
which had serious issues with AWT to the extent that
we simply did not use any AWT or Swing classes.No, it isn't. I mean, sure, it's in a javax.swing.something package, but it doesn't have any GUI components. I don't think headlessness should affect it in the least.
I'm happy to be proven wrong, but only with malfunctioning code, not with a quick look at the name of the package.

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