I am trying to send objects across the network using
ObjectInputStream/ObjectOutputStream based on this example:

http://www.jguru.com/faq/view.jsp?EID=10472

I have created two separate projects: one for the client side and one
for the server side.

Both projects have their independent Message class (exact copy)
incorporated in the package of their respective project.

My problem is that I can send java defined objects such as a String
across the network using this example but when I try a custom object
like the Message class, on the receiving end I get a
ClassNotFoundException when I try to cast the input at this line

Message messageObject = (Message) in.readObject();

I have also tried some other home made classes with the same error. Is
this related to the fact that I place the Message class (and other home
made objects) in two separate packages depending on the project? The
client side project and the server side project would normaly be on
seperate machines so I can't have a common package which would be used
by both projects at the same time. Does anyone see how I can make this
example to work?

By he way, there is a mistake in that example where "123456789" should
be an 123456789

Thanks for any help