Thread: Form using JDBC works in Netbeans but ClassNotFoundEx when called from HTML doc.

Hi!

I'm learning java and facing this weird situation. I've written a JApplet form which accepts data and passes them as a parameter to another class' constuctor. This another class uses JDBC to connect to PostgreSQL and adds the data to a table. I've tested this class by calling the same constructor from a method in a yet different class which is console based and found it to work well.

Back to the JApplet class file. When I run the form from the netbeans right click menu, I'm able to fill up the form and the data is added to the table. But when I call the applet from a HTML file, the form displays correctly but on pressing the submit button I get ClassNotFoundException. (This is because I don't handle this exception in the class file using JDBC but throw it in the constructor and ultimately catch it in the JApplet class.) What can possibly be going wrong here?

I'll post the code if anyone's interested.

It might help if you posted the full text of the error message shown in the browser's java console.
It would say if there was a Permissions/security issue.

Thanks Norm and copeg for your opinions. I too suspect a permissions issue.
I enabled "show java console" in the sun java 6 plugin control panel and opened the web console in firefox browser, checked everything in it and tried running the applet again. Nothing came up in the console. Maybe I did it wrong.

Anyway, I've given up using the applet to add data to database. It occurred to me that since applet runs on client side while the database is supposed to be on the server side, this approach is flawed.

I'm gonna try using a servlet to do the JDBC work while the applet (invoked from a JSP) will just collect the data and pass it to the servlet. Is this approach better?

Nothing came up in the console.

I don't understand how that can be. There is always something in the console.
Here is what is always at the beginning:

Java Plug-in 1.6.0_20
Using JRE version 1.6.0_25-b06 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\Owner

----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

Yes, I think it was Firefox. I get the same console with Chrome.

I've never seen that before.

Forget it then. Thanks a lot anyway for your time.
Cheers!!