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From Raphael Mankin <r...@mankin.org.uk>
Subject Re: hsqldb and NullPointerException
Date Fri, 17 Jun 2005 09:18:19 GMT
I had strange problems (weird Oracle errors rather than NPE) when I
accidentally did an INSERT on something that already had a key. Are you maybe
cloning or modifying an existing object and then trying to save it as new? That
can cause weirdnesses.


On 17-Jun-2005 Vlada Djurovic wrote:
>> Hi,
>> 
>> The usual way to cope with a null pointer exception is
>> 1) compile the sources with the debug option
>> 2) look at the stack trace to find out exactly where the exception occurs
>> 3) look at the indicated line in the source code to see which object is
>> null
>> 4) check (in the source code or elsewhere) why the object is null
>> 
>> Did you already do that ?
>> 
>>     Thomas
> 
> Yes, I did that, and everything else I could think of, but couldn't
> find anything wrong. As I said, it works perfectly inside the IDE, but
> not outside.
> When I run the app standalone, I can connect to database, do simple
> querries, but if I try to do INSERT, UPDATE,DELETE or join, I get the
> NPE.
> First I thought it's a classpath issue, but I guess, if I can connect
> to database and do some things, than the classpath and configuration
> are OK, right? I use the same libs in the IDE and outside it, so it
> should be OK too.
> This is really frustrating:-(
> 
> Thanks for a tip anyway.
> 
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-- 
                               Lead us not into temptation; we
                               can find our own way.


Raphael Mankin
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