title: Eclipse how to link a jar containing javadocs/source with its binary?
body: <p>I would like to have the javadoc comments contained in a jar file show in eclipse when I hover over a class.</p>
  
  <p>For example, after downloading JODA-2.0, three jars are obtained:</p>
  
  <ul>
  <li>joda-time-2.0</li>
  <li>joda-time-2.0-javadoc</li>
  <li>joda-time-2.0-sources
  (<a href="http://sourceforge.net/projects/joda-time/files/joda-time/2.0/joda-time-2.0-dist.zip/download" rel="noreferrer">http://sourceforge.net/projects/joda-time/files/joda-time/2.0/joda-time-2.0-dist.zip/download</a>)</li>
  </ul>
  
  <p>In eclipse, [right click project -> Properties -> Java Build Path -> Libraries -> ADD JARs...] includes the binary in the project (can reference those classes) for joda-time-2.0.jar.</p>
  
  <p>But how can I link in the sources/javadoc comments contained in the other two jar files so that when I hover over those classes I see the javadocs?</p>
  
  <p>Adding the other two jars (joda-time-2.0-javadoc.jar and joda-time-2.0-sources.jar) to the build path does not link the javadocs or the source.</p>