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From: Stanimir Stamenkov <s7an10@netscape.net>
Newsgroups: comp.lang.java.databases
Subject: Re: Problem with JDBC driver and MySQL date_format function
Date: Mon, 16 May 2011 08:35:00 +0300
Organization: A noiseless patient Spider
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Sun, 15 May 2011 19:51:49 -0400, /John B. Matthews/:
> In article <939s7hFsqnU1@mid.individual.net>, Hans Castorp wrote:
>> Jens Riedel wrote on 13.05.2011 08:11:
>>
>>> Since I updated my mysql driver version 3 to version 5
>>> (mysql-connector-java-5.1.7-bin.jar) I get funny strings like
>>> "[B@b57546" when I format datetime columns with the date_format
>>> function instead of the correct formatted date string.
>>
>> That sure looks like the default toString() output of
>> java.lang.Object
>
> No, java.lang.Object looks like this: java.lang.Object@771c8a71

That looks like the output of java.lang.Object.toString() invoked on 
a byte[] instance:

     getClass().getName() + '@' + Integer.toHexString(hashCode())

http://download.oracle.com/javase/6/docs/api/java/lang/Object.html#toString%28%29

http://download.oracle.com/javase/6/docs/api/java/lang/Class.html#getName%28%29

-- 
Stanimir