Confusing. You say you're searching for src.zip file. What do you mean by that?
The Eclipse web site says that Eclipse will run with just the JRE installed, but I read in other places that some functionality may be missing. Therefore,
you should be able to use Eclipse to edit source code without the JDK installed, but I'm confused what the "src.zip" file is, why/where you're looking for it, and what you plan or expect to do with it.