Welcome to our community, Cathy
You will need to install the Java Development Kit (I think
that's the name) and you will need to right-click the Single Source
Layouts area and choose to add a new layout. When you add a new
layout, you should see the option for JavaHelp.
I think it's not there by default because so few folks use
it. WebHelp is really a better way to go.
Cheers... Rick