Serialization and De-Serialization in java with example


Serialization

            Serialization is the process of converting Object state to a byte stream so that the byte stream can be reverted back into a copy of the object. A Java object is serializable if its class or any of its superclasses implements either the java.io.Serializable interface or its subinterface, java.io.Externalizable. 


De-serialization 

       Deserialization is the process of converting the serialized form of an object back into a copy of the object.


Example

Employee.java

import java.io.*;

class Employee implements Serializable
{
	int id=1;
	String name="No Name";
}


Serialization of java object

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

public class SeralizeExample {

	public static void main(String[] args) throws IOException {
		Employee e = new Employee();
		e.id = 4;
		e.name = "candidjava";

		FileOutputStream fo = new FileOutputStream("sam.ser");
		ObjectOutputStream oo = new ObjectOutputStream(fo);
		oo.writeObject(e);

		System.out.println("sucess");
		oo.close();

	}
}
Run the above program to serialize a object

De-serialization java object

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

public class DeserializeObject 
{
	public static void main(String[] args) throws Exception 
	{

		FileInputStream fis = new FileInputStream("sam.ser");
		ObjectInputStream ois = new ObjectInputStream(fis);

		Employee e = (Employee) ois.readObject();

		System.out.println(e.name + "  " + e.id);
		ois.close();

	}
}

Run the above program to deserialize a object




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