There's a very finite amount of stuff you need to pick up and this is common to JRuby, groovy, scala too. Remember you can ask questions on Stackoverflow, IRC

There's a very finite amount of stuff you need to pick up and this is common to JRuby, groovy, scala too. Remember you can ask questions on Stackoverflow, IRC (freenode #clojure, google group, folks are supportive. Re: JVM for non-java programmers: http://stackoverflow.com/questions/4741626/what-parts-of-the-java-ecosystem-and-language-should-a-developer-learn-to-get-the http://stackoverflow.com/questions/4741626/what-parts-of-the... http://stackoverflow.com/questions/4230746/does-being-a-competent-scala-programmer-require-you-to-be-a-competent-java-progra http://stackoverflow.com/questions/4230746/does-being-a-comp... http://marxsoftware.blogspot.com/search/label/Java%20%28General%29 http://marxsoftware.blogspot.com/search/label/Java%20%28Gene... (Bytecode for dummies, the Hotspot switches post are terrific) http://stackoverflow.com/questions/5721496/learning-java-so-i-can-get-at-clojure http://stackoverflow.com/questions/5721496/learning-java-so-...