title: What is the difference between JavaConverters and JavaConversions in Scala?
body: <p>In <a href="http://www.scala-lang.org/api/current/index.html#scala.collection.package"><code>scala.collection</code></a>, there are two very similar objects <a href="http://www.scala-lang.org/api/current/scala/collection/JavaConversions%24.html"><code>JavaConversions</code></a> and <a href="http://www.scala-lang.org/api/current/scala/collection/JavaConverters%24.html"><code>JavaConverters</code></a>. </p>
  
  <ul>
  <li>What is the difference between these two objects? </li>
  <li>Why do they both exist?</li>
  <li>When do I want to use one vs. the other?</li>
  </ul>