Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!eternal-september.org!feeder.eternal-september.org!mx04.eternal-september.org!.POSTED!not-for-mail
From: Steven Simpson <ss@domain.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: Regexp exception in String.replaceAll
Date: Wed, 26 Sep 2012 15:18:13 +0100
Organization: A noiseless patient Spider
Lines: 38
Message-ID: <5efbj9-vr7.ln1@s.simpson148.btinternet.com>
References: <7ku568loa4ogik4e6asouundcbcjurg6lj@4ax.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Info: mx04.eternal-september.org; posting-host="1f86e41cc4e3083c5d82fb40338cf48a"; logging-data="9451"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+LYUBfI4xA7nCzQdIG8i/omG3KNJd2FZM="
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120827 Thunderbird/15.0
In-Reply-To: <7ku568loa4ogik4e6asouundcbcjurg6lj@4ax.com>
Cancel-Lock: sha1:qPQJh4h6xLW5u1YhJLF+5jNZWkw=
Xref: csiph.com comp.lang.java.programmer:18946

On 26/09/12 13:57, Tim Slattery wrote:
> java.lang.IndexOutOfBoundsException: No group 5
>          at java.util.regex.Matcher.group(Matcher.java:470)
>          at java.util.regex.Matcher.appendReplacement(Matcher.java:737)
>          at java.util.regex.Matcher.replaceAll(Matcher.java:813)
>          at java.lang.String.replaceAll(String.java:2189)
>          at (the line shown above)

$ cat Replace.java
public class Replace {
     public static void main(String[] args) throws Exception {
         String upload = "oof flange {FileName} dangle";
         String fileName = "wart$5x";
         String result = upload.replaceAll("\\{FileName\\}", fileName);
         System.err.println(result);
     }
}
$ javac Replace.java
$ java Replace
Exception in thread "main" java.lang.IndexOutOfBoundsException: No group 5
         at java.util.regex.Matcher.start(Matcher.java:374)
         at java.util.regex.Matcher.appendReplacement(Matcher.java:831)
         at java.util.regex.Matcher.replaceAll(Matcher.java:906)
         at java.lang.String.replaceAll(String.java:2162)
         at Replace.main(Replace.java:5)


<http://docs.oracle.com/javase/7/docs/api/java/lang/String.html#replaceAll%28java.lang.String,%20java.lang.String%29>:
> Note that backslashes (\) and dollar signs ($) in the replacement 
> string may cause the results to be different than if it were being 
> treated as a literal replacement string

So you probably had a "$5" in your fileName somewhere.


-- 
ss at comp dot lancs dot ac dot uk