java.lang.Process.info() method incorrectly describes the methods of the Info interface as returning null; they return empty Optionals when information is missing.
"An {@link ProcessHandle.Info} instance has various accessor methods
     * that return information about the process, if the process is alive and
     * the information is available, otherwise {@code null} is returned."

The phrase ", otherwise {@code null} is returned" should be removed.
It will then match the description in ProcessHandle.info().