How do I format source code in JBuilder 3.5? I'd like JBuilder to auto-format source code as I write or to format existing source code, like Emacs does. I've searched many options, but I haven't found it.

Luigi Viggiano

JBuilder does not have this feature, but I suggest you to download and install Jindent and Jindent plugin that is an OpenTool to add this functionality.
Jindent can be also customized thru a simple property file to match your code style.