I've installed Java 8u11 to solve a problem with inability to display TOC i JavaHelp output when using Java 1.1.3 option. But Robo 10 can't find the Java SDK files, even though they are present. I guess I'm doing something dumb here - but I don't understand anything to do with Java (I just need it for Robo output), so don't know what to do next.
JavaHelp is pretty much dying on its feet. It is no longer supported and in most cases webhelp could be used.
If you really are stuck with this output, there aren't too many users who can help. My guess is your system variables need to be set up. There is some information on my site and your developers should be able to assist.
See www.grainge.org for RoboHelp and Authoring tips