JRuby has proved (to me at least) to be really powerful in prototyping and learning Java APIs. A few weeks ago I started thinking to rewrite one of my old Java programs in JRuby. I wrote that Java program as part of learning Java programming (so it’s not as good as I hoped) and I am no longer interested in maintaining it in Java since I’ve learned JRuby. I also thought that I made it a bit complicated to maintain. So I am hoping to simplify it by rewriting in JRuby and Ruby. It will be a challenge for me since I am still learning Ruby, but I hope I enjoy it.