The difference of "Separators" in Java 8 specs from Java 7 specs
are "...", "@", and "::". (not included symbol ").
About separator ... : It is using in variable arguments.
About separator @ : We usually use it in Java annotation.
So, how about separator :: ?
(In other programming language, such as C++, it means the scope operator,
continuously after the class name.)
Thanks for your posting.