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Check if String.matches() AND (if yes) extract number from String?

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From	jochen2@brenz.com (Jochen Brenzlinger)
Newsgroups	comp.lang.java.programmer
Subject	Check if String.matches() AND (if yes) extract number from String?
Followup-To	comp.lang.java.programmer
Date	21 Nov 2011 15:04:48 GMT
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Assume I have a String var and value like:

String var = new String("foobar[345]");

Now I want to check if this string matches a certain pattern and if yes extract the number into a long var.
The first part is easy:

if var.matches("\\w*\[\\d+\]") {
   long l = ????;  }
   
...but I have no idea on how to extract the number.
How can this be achieved?

Jochen

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Check if String.matches() AND (if yes) extract number from String? jochen2@brenz.com (Jochen Brenzlinger) - 2011-11-21 15:04 +0000
  Re: Check if String.matches() AND (if yes) extract number from String? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-11-21 07:33 -0800
  Re: Check if String.matches() AND (if yes) extract number from String? Tassilo Horn <tassilo@member.fsf.org> - 2011-11-21 16:45 +0100
  Re: Check if String.matches() AND (if yes) extract number from String? Henk van Voorthuijsen <voorth@xs4all.nl> - 2011-11-21 07:39 -0800
  Re: Check if String.matches() AND (if yes) extract number from String? Roedy Green <see_website@mindprod.com.invalid> - 2011-11-21 10:26 -0800
  Re: Check if String.matches() AND (if yes) extract number from String? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-11-21 11:43 -0800

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