Serialize and Deserialize Java Objects

Serialize and Deserialize Java Objects

I create a Phone object and serialize it. Then I change the data in the object. Next, the old object is read back and compared to the changed object. The output should be something like this.

Phone Entry: prabhu - 1234567890
Phone Entry: prabhu - 0987654321
Phone Entry: prabhu - 1234567890

package com.javanotes2all.java.Objects;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class SerializationAndDeserialization 
{
 public static void main(String[] args) 
 {
    Phone phone01 = Phone.getNewPhone("prabhu", "1234567890");
    Phone phone02 = Phone.getBlankPhone();
      
    phone01.printNumber(); // Print start value
      
 try {
     ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream("object.dat"));
        out.writeObject(phone01); // Serialize Object
        out.close();
      } catch(Exception e){
        e.printStackTrace();
      }

      phone01.setNumber("0987654321"); // Change Object 
      
      try {
        ObjectInputStream in = new ObjectInputStream( new FileInputStream("object.dat"));
        phone02 = (Phone) in.readObject();
        in.close();
      } catch(Exception e){
        e.printStackTrace();
      }
      
      phone01.printNumber(); // Print Changed Object
      phone02.printNumber(); // Print Original Object
      
 }
}
class Phone implements Serializable 
{
 private String name;
 private String number;

 private Phone(){
  this.name = "";
  this.number = "";
 }

 private Phone(String name, String number){
  this.name = name;
  this.number = number;
 }

 public static Phone getNewPhone(String name, String number){
  Phone newPhone = new Phone(name, number);
  return newPhone;
 }

 public static Phone getBlankPhone(){
  Phone newPhone = new Phone();
  return newPhone;
 }

 public void setNumber(String number){
  this.number = number;  
 }

 public void printNumber(){
  System.out.println("Phone Entry: " + this.name + " - " + this.number);    
 }

}