Java source code

where can I find the Java source code? e.g. I read the descriptions
of methods and class fields, but it would be much better to be able to
read the actual code. the descriptions are not always helpful.

Any help will be highly appreciated.

You should have a directory called “sunspotfrcsdk” somewhere in your user’s documents folder. Inside of there, look in: lib/WPILibJ/src/ and you will find all of the source files.