transient

import java.io.*;

public class Main {
  public static void main(String[] args) {
    Person person = new Person();
    person.fname = "John";
    person.lname = "Doe";
    person.age = 24;
    person.accessCode = 5044;

    // Serialize the object
      ByteArrayOutputStream output = new ByteArrayOutputStream();
      try{
      ObjectOutputStream objOut = new ObjectOutputStream(output);
      objOut.writeObject(person);
    } catch (IOException e) {}

    // Deserialize the object
    Person person2 = new Person();
    try {
    ObjectInputStream objIn = new ObjectInputStream(newByteArrayInputStream(output.toByteArray()));  
    person2 = (Person)objIn.readObject(); 
    } catch(Exception e) {}

    // Print the deseralized object
    System.out.println("First name: " + person2.fname);
    System.out.println("Last name: " + person2.lname);
    System.out.println("Age: " + person2.age);
    System.out.println("Access code: " + person2.accessCode);
   }
 }

 class Person implements Serializable {
  String fname = "John";
  String lname = "Doe";
  int age = 24;
  transient int accessCode = 0;
}