ClassNotFoundException when deserializing a binary class file's contents

Question

I don\'t know much about Java. I\'m trying to read a file containing an int and various instances of a class called \"Automobile\". When I deserialize it, though, the progra

Answer 1

Ive had a similar problem with a ObjectInputStream reading serialized Objects. The classes for those Objects i added at runtime with a URLClassloader. The problem was that the ObjectInputStream did not use the Thread ClassLoader which i set with

Thread.currentThread().setContextClassLoader(cl);

but instead the AppClassLoader, which you cannot customize with java 9. So i made my own ObjectInputStream as a subtype of the original one and overidden the resolveClass Method:

@Override
protected Class resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
    String name = desc.getName();
    try {
        return Class.forName(name, false, Thread.currentThread()
                .getContextClassLoader());
    } catch (ClassNotFoundException ex) {
        Class cl = primClasses.get(name);
        if (cl != null) {
            return cl;
        } else {
            throw ex;
        }
    }
}