This question already has an answer here:
A friend and I would like to do some real-time collaboration with Eclipse. Does anyone know a way we can share the entire project? I've looked around and I can't really find anything but something called Cola, and I can't find anything more on that than a video of them using it.
We've already installed the latest ECF, so if we're headed in the right direction, what's next?
The instructions for Cola are right here.
I think Saros is what you are looking for.
来源：https://stackoverflow.com/questions/7134952/real-time-collaboration-in-eclipse