I'm using eclipse to write a small game and I now realize I want to make a big change to the core of my program. What is the best way to save two versions of the same code separately (if something goes wrong) and test them side by side? Is it a good idea to simply copy paste one file into a new one and work from there?
Thanks
P.S. I know about reverting to a previous version or time but I've gotten it into my head that this is different, am I wrong?