Yep that framework takes a pretty similar approach to ours. We'd actually evaluated that (and about 10 others) before deciding to roll our own due to various requirements we had that no frameworks were able to provide but you're probably right, something like JCLI would be a good match for mkgmap. JewelCLI (http://jewelcli.sourceforge.net/) and Args4J (https://args4j.dev.java.net/) are a couple of others that take this approach. I'd recommend steering clear of the various alternatives that aren't annotation-based; I don't think we managed to find any that worked particularly well or had clean syntax with minimal lines of code required to use them. This was a year or so ago though, perhaps that has changed. FWIW, JOpt has a list of some of the more well known CLI parsers: http://jopt-simple.sourceforge.net/ Chris
Sounds good to me!
Maybe there is an open source framework we could use: http://www.cyclopsgroup.org/projects/jcli/
Best wishes Christian