Re: Regex?

From:

Knute Johnson <eternal@knutejohnson.com>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 20 Jun 2014 15:46:13 -0700

Message-ID:

<lo2dji$k7u$1@dont-email.me>

On 6/20/2014 08:14, Eric Sosman wrote:

On 6/20/2014 11:06 AM, Knute Johnson wrote:

On 6/20/2014 00:25, Robert Klemme wrote:

On 06/20/2014 07:03 AM, Knute Johnson wrote:

Pattern.compile(Pattern.quote("the string with the ) in it"));

There are more ways:

Pattern.compile("the string with the \\) in it");
Pattern.compile("the string with the \\Q)\\E in it");

Cheers

robert

Thanks Robert,

The problem was actually

String str = "(something";
Pattern.compile(str);

so now it is

Pattern.compile(Pattern.quote(str));

I hate to make them

Pattern.compile(str+"\\Q")

(the cognoscenti would have my ...)

Something seems peculiar: If the cognoscenti who provide the
search strings want all characters to stand for themselves and
not to function as regex metacharacters, what's the point of
using a regex? Why not use theString.indexOf(str)? Is there
more to the use case than we've been told?

Well I've been round and round on this, I thought originally that I
could find all the examples of the search string with one call to
Matcher.matches() but I can't figure out how to do that. It may be
possible but I can't find an example and String.indexOf is case
sensitive and it is very easy to make Matcher.find() not be which is
what I want for this application.

As to the cognoscenti, I meant using the + operator to concatenate a
String but if I can work a Vector in there somewhere I will :-).

--

Knute Johnson