How can I create Graph(Data structure) with Java ?

How can I create Graph(Data structure) with Java ?
I want to create a Graph containing some nodes and edges. I need the java code for that.

Thanking you

double-posted in new to java section.

you can always create your classes hehe ;)

or you can try to use some existing good libraries on the net like this:

jgrapht.sourceforge.net
(this one is nice)

or

javaddlib.sourceforge.net/jdd/
(javaddlib.sourceforge.net/jdd/tutorial/Graph.html)