Example of Serialization/Deserialization

package com.test.yuvagen.basic;

/**
 * Implements Serializable
 *
 * @author:http://javainterviewprograms.blogspot.in/
 *
 */

import java.io.*;

class Demo implements Serializable

{

    public int a;

    public String b;

         

    // Default constructor

    public Demo(int a, String b)

    {

        this.a = a;

        this.b = b;

    }

}

class Test

{

    public static void main(String[] args)

    {  

        Demo object = new Demo(1, "saurabh");

        String filename = "file.ser";

        

        // Serialization

        try

        {  

            //Saving of object in a file

            FileOutputStream file = new FileOutputStream(filename);

            ObjectOutputStream out = new ObjectOutputStream(file);

            

            // Method for serialization of object

            out.writeObject(object);

            

            out.close();

            file.close();

            

            System.out.println("Object has been serialized");

        }

        

        catch(IOException ex)

        {

            System.out.println("IOException is caught");

        }

        Demo object1 = null;

        // Deserialization

        try

        {  

            // Reading the object from a file

            FileInputStream file = new FileInputStream(filename);

            ObjectInputStream in = new ObjectInputStream(file);

            

            // Method for deserialization of object

            object1 = (Demo)in.readObject();

            

            in.close();

            file.close();

            

            System.out.println("Object has been deserialized ");

            System.out.println("a = " + object1.a);

            System.out.println("b = " + object1.b);

        }

        

        catch(IOException ex)

        {

            System.out.println("IOException is caught");

        }

        

        catch(ClassNotFoundException ex)

        {

            System.out.println("ClassNotFoundException is caught");

        }

    }

}

Output :

Object has been serialized

Object has been deserialized

a = 1

b = saurabh