title: What is the difference between modules and JAR files?
body: <p>I am learning about Java 9 from <a href="https://docs.oracle.com/javase/9/whatsnew/toc.htm" rel="noreferrer">What's New in Java9</a> and one of the hot topics in the discussion is <em>The Modular JDK</em>.</p>
  
  <p>Are JAR files modules?</p>
  
  <p>How is a module different from a JAR file?</p>