gnutella simple java API

Hi

I have been looking for a simple java API to work with gnutella network.
I found Jtella but it's pretty outdated.
Then I tried limewire but it's kinda complex
Reading throughout this gnutella forum found some posts that sugest to use Phex, but I haven't found any documentation o how to use Phex as a simple java API

Any idea on what can be done here, I just need basically:
-search in the gnutella network
-download file from given search results
-generate a file hashcode (to search through the hashcode, like magnet link)

I don't mind using limewire or phex, or anything else, as long as it keeps simple to use.

Any help will be really appreciated
Thanks