What helps me:
- to look at the source code of the library
- to use a good IDE like IntelliJ Idea or Eclipse. There you can control click on any method and it jumps to the source code. When you type
.after an object the autocomplete is very good and it lets you explore all the available options, it shows you the types. I find that with good autocomplete the documentation is less crucial.
The autocomplete in the Processing IDE is much more limited which doesn’t help much when using libraries.
Drawback: switching to a more powerful IDE takes some learning, as the code is pure Java and not “Processing-flavor Java”.