Re: NPE in creating a SQLException

Yep, that's it ! The toString method returning null...

Cheers,
Csaba.


On Tue, 2003-07-29 at 18:16, Peter Royal wrote:
> On Tuesday, July 29, 2003, at 11:50  AM, Scot P. Floess wrote:
> > Does your class have a toString() method?  You mention that this is
> > occurring in a constructor.  Certainly if your toString() has object
> > members being printed in such a way as method calls are performed on
> > those object prior to their being set to instances there could be
> > issue (ie NullPointerException).  However, assuming this to be true,
> > one would hope the stack trace would indicate the toString() method.
>
> That's the rub, its not in my class :)
>
> >> java.lang.NullPointerException
> >>          at java.io.PrintWriter.write(PrintWriter.java:247)
> >>          at java.io.PrintWriter.print(PrintWriter.java:392)
> >>          at java.io.PrintWriter.println(PrintWriter.java:529)
> >>          at java.lang.Throwable.printStackTrace(Throwable.java:509)
> >>          at java.sql.SQLException.<init>(SQLException.java:103)
> >>          at
> >> org.postgresql.util.PSQLException.<init>(PSQLException.java:19)
> >>          at
> >> org.postgresql.jdbc1.AbstractJdbc1Connection.ExecSQL(AbstractJdbc1Conn
> >> e
> >> c
> >> tion.java:480)
>
> But I think I tracked it down...
>
> The PSQLException constructor that is being used is
>
>     public PSQLException(String error)
>     {
>         super();
>         translate(error, null);
>     }
>
> which does not set the 'message' variable.. Then the toString() of
> PSQLException is:
>
>     public String toString()
>     {
>         return message;
>     }
>
> so that is returning null.. and the cause of the NPE. I see the bug is
> fixed in CVS :)
>
> thanks for the help!
> -pete
>
>
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