Oh, I wouldn't say that you should not stick with one. In the end, I ended up with just doing Java for university and learning a co-language (Ruby) for personal

Oh, I wouldn't say that you should not stick with one. In the end, I ended up with just doing Java for university and learning a co-language (Ruby) for personal pleasure and fun. Pick early on. You can also pick based on the support you gain from the community for your special problem. But at least have a look at some of the tools that are handed to you instead of blindly picking one. The problem I see is that a lot of people stick with the first language they ran over, even if it was not fit to solve their initial problem.