Description:
I'm calling 
   hasResults = myStatement.getMoreResults() ;

Which gives me this:
java.lang.NullPointerException
        at com.mysql.jdbc.Statement.getMoreResults(Statement.java:521)
        at com.mysql.jdbc.Statement.getMoreResults(Statement.java:513)
        at MYCLASS.executeSql(QueryProcessor.java:231)

I get NPE's with 3.1.7 and 3.1.6 whereas 3.0.16 works fine.

I'm writing DB independent code where the statement executed may contain more than one
result.  Like the javadoc says, I loop until
((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))

but the getMoreResults() gives the NPE.

My server version is 4.0.18-nt

How to repeat:
synopsis of my code:

boolean hasResults = myStatement.execute("select version()") ;
ResultSet rs = myStatement.getResultSet() ;
rs.close() ;
hasResults = myStatement.getMoreResults() ;

Suggested fix:
return false.

I want to add myself to this bug (#9704) updates-mailing list. I didn't find a way for it.
So, I'm adding this comment here to sign up for this bug progress update emails...
-Sakthi

Fixed for 3.1.8. You can test the fix with the nightly snapshot from
http://downloads.mysql.com/snapshots.php after 00:00 GMT April 8th.

Thanks for your bug report!

Thanks for fixing this issue! I have verified the fix with
mysql-connector-java-3.1-nightly-20050411 build and it works fine!
-Sakthi