ClassNotFoundException reading object from ObjectInputStream

[David Liebtag]

I have what I hope is a simple question:

I'm learning how to serialize objects. I create an ObjectOutputStream and
writeObject an object to it. I then create an ObjectInputStream and try to
readObject the object from it. readObject is failing with a
ClassNotFoundException. The class mentioned in the exception description is
in a JAR file listed in CLASSPATH. I know the class can be found because I
successfully create an object from the class and wrote it to the
ObjectOutputStream.

Can anyone suggest why readObject can not find my class?

Thanks a lot.

David Liebtag
IBM APL Products and Services

[David Liebtag]

More information:

My sequence of method calls works if I run it in a Java class. It does not
work if I call the sequence of methods through JNI.

I suspect that when a class is referenced in Java code, the JVM loads the
class and makes it available to the readObject deserialization process.
When I use the JNI FindClass API, the class is not made available to
readObject.

Can anyone confirm this is true and perhaps suggest a work-around?

Is it not possible to deserialize objects from JNI code?

David Liebtag
IBM APL Products and Services