Tools to document existing APIs in Java, Kotlin and Go

[Pavlos Kosmetatos]

I have several large existing APIs and would love to take advantage of the documentation side of Swagger.

What tools are there to have the API descriptions in the code (for example in the form of annotations or comments)?

I found this for Java, but I am not sure I have found all the alternatives. I have services in Java (Jersey), Go and Kotlin (also Jersey).

I also found this that looks interesting but unfortunately it doesn't seem maintained.

Thanks!