javadoc
Generate Java API documentation in HTML format from source code.
TLDR
Generate documentation for Java source code and save the result in a directory
$ javadoc -d [path/to/directory/] [path/to/java_source_code]
Generate documentation with a specific encoding
$ javadoc -docencoding [UTF-8] [path/to/java_source_code]
Generate documentation excluding some packages
$ javadoc -exclude [package_list] [path/to/java_source_code]