title: Is it valid to make Ruby Gems an analogy to Java JARs?
body: <p>I believe I have put the question quite clearly and in a concise manner. Why do I ask? </p>
  
  <p>I am to explain Ruby on Rails framework to students and this requires me to make some analogies to the Java world (as the course is quite Java-centric). I have no hands-on experience with Ruby on Rails but I sense the Gem/Jar analogy is a valid one.</p>
  
  <p>Could anyone perhaps shed more light on this issue?</p>