📘 Lesson · Lesson 46

Serialization

What is Serialization?

Serialization converts an object into bytes so it can be saved to a file or sent over a network. Deserialization rebuilds the object from those bytes.

Making a Class Serializable

import java.io.*;
class Student implements Serializable {
    int id; String name;
    Student(int id, String name) { this.id=id; this.name=name; }
}

// Serialize
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("s.ser"));
out.writeObject(new Student(1, "Aman"));
out.close();

Summary

Implement Serializable; use ObjectOutputStream to save, ObjectInputStream to read.
Serialization = object→bytes; deserialization = bytes→object.

Serialization क्या है?

Serialization object को bytes में बदलता है ताकि उसे file में save या network पर भेजा जा सके। Deserialization उन bytes से object फिर बनाता है।

Class को Serializable बनाना

import java.io.*;
class Student implements Serializable {
    int id; String name;
    Student(int id, String name) { this.id=id; this.name=name; }
}

// Serialize
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("s.ser"));
out.writeObject(new Student(1, "Aman"));
out.close();

सारांश

Serializable implement करें; save को ObjectOutputStream, read को ObjectInputStream।
Serialization = object→bytes; deserialization = bytes→object।

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