Regex for name problem

Question

I need regex for recognizing names which can be [a-zA-Z_] then . (dot) then again [a-zA-Z_]. I ([a-zA-Z_]+) \.([a-zA-Z_]*) but it doesn't work. Help ? Can anybody give me hoe to do that in JFlex ?

Answer 1

changing regexp by escaping dot and removing space.

([a-zA-Z_]+)\.([a-zA-Z_]*)

additional suggestion to drop () and use temporary identifiers

edit: increasing reputation by commenting regexp