classformaterror again

[Leonard Bouchet <le...@lajoiedelire.ch>]

Hi again,

I really can't figure out why I have a classformaterror (using tomcat 3.1,
jdk 1.2.2), because it comes depending on what I have in my source code.

if I put a method that returns a java.sql.ResultSet, tomcat can't load the
class. If I comment out this method and reload the classes, tomcat doesn't
have any problem. But I really need to return a ResultSet!!

I'll appreciate any help

thanks

-leo

Re: classformaterror again

[Daniel Barclay <Da...@digitalfocus.com>]

Leonard Bouchet wrote:
> 
> Hi again,
> 
> I really can't figure out why I have a classformaterror (using tomcat 3.1,
> jdk 1.2.2), because it comes depending on what I have in my source code.
> 
> if I put a method that returns a java.sql.ResultSet, tomcat can't load the
> class. If I comment out this method and reload the classes, tomcat doesn't
> have any problem. But I really need to return a ResultSet!!

Try running "javap java.sql.ResultSet" to see if it can load that class
successfully.  Make sure you set the class path to the same effective
class path that Tomcat it using.  (Account for automatically-included 
WEB-INF/classes directories and WEB-INF/lib/*.jar files.)

Try running "java -verify java.sql.ResultSet" to verify the class file
directly.  (If it complains that it's an interface and not a class, or
says that it can't find method Main, that's okay.)

Try the -verbose option to the java command; that might tell you which
class files or Jar files it's looking at.


Daniel
-- 
Daniel Barclay
Digital Focus
Daniel.Barclay@digitalfocus.com

Re: classformaterror again

[William Brogden <wb...@bga.com>]

Leonard Bouchet wrote:
> 
> Hi again,
> 
> I really can't figure out why I have a classformaterror (using tomcat 3.1,
> jdk 1.2.2), because it comes depending on what I have in my source code.
> 
> if I put a method that returns a java.sql.ResultSet, tomcat can't load the
> class. If I comment out this method and reload the classes, tomcat doesn't
> have any problem. But I really need to return a ResultSet!!
> 
> I'll appreciate any help
> 
> thanks
> 
> -leo

Are you sure you don't have any older JAR files hanging around from
earlier Java versions?

-- 
WBB - wbrogden@bga.com  Chief Scientist, LANWrights, Inc.
Java Programmer Certification information and mock exam
at  http://www.lanw.com/java/javacert/