Java in a Nutshell, 5th Edition

Name

OptionalDataException

Synopsis

Thrown by the readObject( ) method of an ObjectInputStream when it encounters primitive type data where it expects object data. Despite the exception name, this data is not optional, and object deserialization is stopped.

Figure 9-42. java.io.OptionalDataException

public class OptionalDataException extends ObjectStreamException {
// No Constructor
                  // Public Instance Fields
     public boolean eof;  
     public int length;  
}