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Here i will learn and teach you what is Serialization in Java and how to write code for the same. I am learning this because i am going for an Interview. 
What is Serialization
Serialization is a process in which current state of Object will be saved in stream of bytes. As byte stream create is platform neutral hence once objects created in one system can be deserialized in other platform.
What is the use of Serialization
As written above serialization will translate the Object state to Byte Streams. This Byte stream can be used for different purpose.
Write to Disk
Store in Memory
Sent byte stream to other platform over network
Save byte stream in DB(As BLOB)
Serialization and Deserialization in Java
Now we know what is serialization. But in terms of Java how this serialization will work and how to make a class serializable. Java has already provided out of the box way(java.io.Serializable Interface) to serialize an Object. If you want any class to be serialized then that class needs to implement give interface.
Note*: Serializable Interface is a Market Interface. Hence there is no method in Serializable interface.
Code for Serialization of Java Class
Employee.java
SerializaitonClass.java
DeserializationClass.java
First run “SerializaitonClass” and you will get “employee.txt” file created.
Second run “DeserializationClass” and java will deserialize the class and value will be printed in console.
Output would be
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