Java에서 객체 직렬화 프로세스는 무엇입니까?

import java.io.*;

public class Person implements Serializable {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    @Override
    public void writeObject(ObjectOutputStream out) throws IOException {
        out.writeObject(name);
        out.writeInt(age);
    }

    @Override
    public void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
        name = (String) in.readObject();
        age = in.readInt();
    }

    public static void main(String[] args) {
        try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("person.ser"))) {
            Person person = new Person("John", 30);
            out.writeObject(person);
        } catch (IOException e) {
            e.printStackTrace();
        }

        try (ObjectInputStream in = new ObjectInputStream(new FileInputStream("person.ser"))) {
            Person person = (Person) in.readObject();
            System.out.println(person.name + ", " + person.age);
        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}