ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Serialize and De-Serialize Object in Java

Updated on October 29, 2012

Introduction

What is Serialization? What it Does Why Do we need it?

Ans: Serialization is a marker interface which doesn't have any method but still classes implements it.

Serialization means maintaining state of an Object ,basically it saves the value of an object into memory.

But still we can do it if we want to save it writing it in memory but why do our class need to implement it.

The main use of serializable is when you are passing Object from one server to another it generates and hexadecimal code and this is to insure that Object reaches to another Server maintaining its state.


Following and Example How to serialize and De serialize a Java Class Object:


First make a Java Class as mentioned below:




Test.Java

import java.io.Serializable;


public class Test implements Serializable{

	public String a;
	
	public Test()
	{
		System.out.println("Constructor");
	}
	
	static{
		System.out.println("static");
	}

	public String getA() {
		return a;
	}

	public void setA(String a) {
		this.a = a;
	}
	

	
}

Here we have made a Test Class Which has a String variable a and also we made an default constructor just to see whether it is called during serialization and deserialization or not


and also Static block is written to check its role.


Now we will do SERIALIZATION of Test.JAVA

SerializiaingObject.JAVA

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;


public class SerializiaingObject {

	
	public static void main(String []  args)
	{
		Test t=new Test();
		try{
			t.setA("Serialized String");
			FileOutputStream fileOut =new FileOutputStream("test.ser");
			ObjectOutputStream out =new ObjectOutputStream(fileOut);
			out.writeObject(t);
			out.close();
			System.out.println("serialized");
			fileOut.close();
			System.out.println(t.a);
			t.setA("After Serialization");
		}catch(IOException i)
		{
			i.printStackTrace();
		}


	}
}

DeserializingObject.JAVA

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;


public class DeserializingObject {


	public static void main (String[] args)
	{

		Test e = null;
		try
		{
			FileInputStream fileIn =new FileInputStream("test.ser");
			ObjectInputStream in = new ObjectInputStream(fileIn);
			e = (Test) in.readObject();
			in.close();
			System.out.println("Deserialized");
			System.out.println(e.a);
			fileIn.close();
			e.a="test";
		}catch(IOException i)
		{
			i.printStackTrace();
			return;
		}catch(ClassNotFoundException c)
		{
			System.out.println(".Test class not found.");
			c.printStackTrace();
			return;
		}

		System.out.println(e.a);
	}
}

Conclusion

Now run the code and Check the output in case of any query please comment.

Comments

    0 of 8192 characters used
    Post Comment

    No comments yet.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)