need API for Connection Routing in Interactive Diagram Editor

I am trying to develop an Interactive Diagram Editor, for designing electronic circuits (block diagrams) using Java. I need to figure out a way to connect the nodes and the blocks.
Can anyone suggest a pre-existing standard JAVA API / library which I can use in my application development.
Thanks in advance.
Cheers,
Pavan

Oh, you even multiposted within the same site, as well as posting to at least 3 different forums? You must be really desperate to cheat on your homework.

db

Desperate yeah.....but i am not trying cheat.
I am trying to develop an Diagram editor and right now I am having troubles with the wiring/connections stuff.
Thought I would definitely get some help for you guys.
Thanks for your interest.