Serialization and Deserialization

Step 1 : implement the Serializable interface

import java.io.Serializable;

public class Person implements Serializable {
    private static final long serialVersionUID = 1L; // recommended for Serializable classes
    private String name;
    private int age;
    private String address;
    public Person(String name, int age, String address) {
        this.name = name;
        this.age = age;
        this.address = address;
    }

    public String getName() {
        return name;
    }
    public int getAge() {
        return age;
    }
    public String getAddress() {
        return address;
    }
    @Override
    public String toString() {
        return "Person{name='" + name + "', age=" + age + ", address='" + address + "'}";
    }
}

Step 2 : Serialize (write) the Serializable object to a file

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

public class SerializeExample {
    public static void main(String[] args) {
        Person person = new Person("Alice", 30, "123 Main St, Wonderland");

        try (FileOutputStream fileOut = new FileOutputStream("person.ser");
             ObjectOutputStream out = new ObjectOutputStream(fileOut)) {

            out.writeObject(person);
            System.out.println("Person object has been serialized to person.ser");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Step 3 : Deserialize (read) the object from the file

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

public class DeserializeExample {
    public static void main(String[] args) {
        try (FileInputStream fileIn = new FileInputStream("person.ser");
             ObjectInputStream in = new ObjectInputStream(fileIn)) {

            Person person = (Person) in.readObject();
            System.out.println("Deserialized Person object: " + person);

        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}