Is there a Graph class in Java?

[Anon]

Dear all,

I am trying to implement the London Undeground map as a graph, so that I can apply it to Dijkstra's algorithm.
I am not sure how to implement it though
Many thanks
Katie

[Anon]

This isn\'t going to be THAT much help, but I remember having to need a third party package last time I did complex graphs.