To initialize a transient field, what is the most simple solution

class MyClass implements Serializable {
  transient int myTransient;
  //Other variables
}

When I restore this class I want to initialize myTransient manually, but otherwise I just want to use the default serialization.

How can I inject an init() method into the object restore process without re-writing the entire serialization mechanism as it seems like Externalizable would have me do?