Java - Deserialization InvalidClassException (No valid constructor)

Question

I\'m trying to serialize an object and then deserialize it after sending its data to a client program.

Here\'s an example of how the object\'s inheritance works. The obj

Answer 1

I faced the same issue with Hazelcast's serialization, but solved it without resorting to an intermediary class, by using custom serialization. I added an empty no-arg constructor to the Animal class and implemented the Person class as follows:

class Person extends Animal implements Serializable {

    private void writeObject(ObjectOutputStream o) throws IOException {
        o.writeObject(this.fieldA);
        o.writeObject(this.fieldB);
        o.writeObject(this.fieldC);
        ...
    }

    private void readObject(ObjectInputStream o) throws IOException, ClassNotFoundException {
        this.fieldA = (TypeOfA) o.readObject();
        this.fieldB = (TypeOfB) o.readObject();
        this.fieldC = (TypeOfC) o.readObject();
        ...
    }
}