I asked this question on stackoverflow and got a similar response.. Maybe I'm not asking the right question??

I'm not looking for tutorials, I'm looking for the source code for FULL programs of object oriented programs. I'm trying to build my first larger program now (a few hundred lines of code) and want to see examples of programs similar to this size.

No worries, you can still use these sites to look for large open source projects. Pick a topic that interests you and have a look :). I'm a big fan of deepstream.io so if you appreciate it like me then you could look at this: github.com/deepstreamIO/deepstream.io-client-java