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

Answer 2

You need to escape the dot: "\." - otherwise, the regex parser treats it as the reserved "any char" symbol.

-- EDIT -- Now that we know that the dot IS escaped and therefore not the real problem: Are you sure the space before the dot is intentional?