I am very proficient in java. I have 17 years java developing experience now, and have worked for more than 10 years. My work is online game developing, and mainly focus on server side, using java under Linux environment. I made many great projects using java, for example, I made the tools which could convert java files into c++ scripts, of course garbage collection included, this job was very similar to a compiler, and was very complex. I also made our own mobile game using java, I can show you the demo of client, if you like. I have a very good review on Freelancer.com, I never miss a project once I accept the job, you can check my review. Trust me, please let expert help you. Besides, I am very proficient in c++ also, hope I can help you.