how to tell if nullpointerexception is really a JDBC question

[Barbara Norway]

Hi,

The sheriff moved my question (Another null pointer exception) to the JDBC forum but, as a real newbie, how can I tell that's what is causing the problem? When I get an Oracle error (e.g. ORA-xxxx: Unexpected end to SQL statement , etc. I can tell; but in this case?

Please let me know how I can determine this. I wasn't really looking for someone to debug my code for me but, rather, give me a tip or clue about where to start looking.
Thanks.

[Dirk Schreckmann]

You still haven't posted any example code to demonstrate your problem, so I'm partially guessing about things.

From your posts in that thread, your questions seemed to center on inserting a null reference into a database (as a number), and then wondering if that would cause a NullPointerException. So, it seemed that the thread was JDBC-specific.

[Junilu Lacar]

Looking through the stacktrace in your other post, would you happen to have a JSP called display.jsp in your app? If you do, then there's probably something in there where you're trying to display a numeric value (possibly also formatting it) and you don't have a valid number.