The Linux Tools Javadocs plugin displays Javadoc documents in Eclipse's built in help system. For example, if one were to install a Javadoc package (i.e., xmvn-javadoc), the Javadocs from that package would be browseable in the Eclipse help system. This plugin is also capable of crawling user specified directories, and displaying the Javadocs within those directories in the Eclipse help system.
By default the plugin crawls /usr/share/javadoc for valid Javadocs to display. It can also display Javadocs present in user specified directories.
You can download the plugin from our update site, or
check the project plugins out of Git directly from github at https://github.com/eclipse-linuxtools/org.eclipse.linuxtools.git.