273     protected final void finalize() { }

   273     protected final void finalize() { }

   274 

   274 

   275     /**

   275     /**

   276      * prevent default deserialization

   276      * prevent default deserialization

   277      */

   277      */

   278     private void readObject(ObjectInputStream in) throws IOException,

   279     private void readObject(ObjectInputStream in) throws IOException,

   279         ClassNotFoundException {

   280         ClassNotFoundException {

   280         throw new InvalidObjectException("can't deserialize enum");

   281         throw new InvalidObjectException("can't deserialize enum");

   281     }

   282     }

   282 

   283 

   283     private void readObjectNoData() throws ObjectStreamException {

   285     private void readObjectNoData() throws ObjectStreamException {

   284         throw new InvalidObjectException("can't deserialize enum");

   286         throw new InvalidObjectException("can't deserialize enum");

   285     }

   287     }

   286 

   288 

   287     /**

   289     /**