To mount a Javadoc index, select the Javadoc tab in the Explorer, right-click the Javadoc node, and choose Mount Directory. Now select the directory where your documentation files reside, usually in a directory called Javadoc if Javadoc utility was used or it could be directory where you copied your java documentation files from other sources such as download. The directory selected for mounting should contain one of the following directories (files) - index-files, api/index-files, index-all.html, api/index-all.html.