Finding comments using java expressions

Question

I'm working on an expression that finds comments which begin with % and end with \n or \r and also multiple line comments /* */. I'm running into trouble for the one beginning with %. I can get it to detect when the comment starts but it is not terminating with a new line.

"(%.*\\n\\r)|(/\\*(?:.|[\\n\\r])*?\\*/)"

For example, if I have

%hello

nothing nothing nothing

fi

It takes the nothing nothing nothing line as a comment but not the fi line. I'm so confused.

This isn't a direct answer, but this site is really helpful for playing with RegEx in real time: fileformat.info/tool/regex.htm — jefflunt
– jefflunt, Commented May 9, 2011 at 21:27

morja · Accepted Answer · 2011-05-09 21:42:16Z

2

Try this:

((?:%.*?[\\n\\r])|(?:/\\*(?:.|[\\n\\r])*?\\*/))

See here: rubular

Or with Pattern.DOTALL

(?s)((?:%[^\\n\\r]*)|(?:/\\*.*?\\*/))

edited May 9, 2011 at 21:42

answered May 9, 2011 at 21:31

morja

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1 Comment

morja Over a year ago

Your welcome. Btw. if an answer is solving your problem you should accept it.

Edwin Buck · Accepted Answer · 2011-05-09 21:24:25Z

1

http://ostermiller.org/findcomment.html

answered May 9, 2011 at 21:24

Edwin Buck

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