kohsuke/args4j — pull request #6 by demobox (2011-12-03 02:09:05+00:00)
Title: Added an option handler to support explicitly set booleans, i.e. '-myOpt false' and '-myOpt true' rather than '-myOpt' for true and omitting the option for false

This is useful especially if you want to have a required boolean value that can be false. The standard boolean is only false when omitted.