java.io.Serializable如何成为Memento模式？

import java.io.*;

class Originator implements Serializable {
    private String state;

    public void setState(String state) {
        this.state = state;
    }

    public String getState() {
        return state;
    }

    public Memento saveStateToMemento() {
        return new Memento(this);
    }

    public void restoreStateFromMemento(Memento memento) {
        this.state = memento.getState();
    }
}

class Memento implements Serializable {
    private String state;

    public Memento(Originator originator) {
        this.state = originator.getState();
    }

    public String getState() {
        return state;
    }
}

public class Main {
    public static void main(String[] args) {
        Originator originator = new Originator();
        originator.setState("State 1");

        Memento memento = originator.saveStateToMemento();

        originator.setState("State 2");
        System.out.println("Current state: " + originator.getState());

        originator.restoreStateFromMemento(memento);
        System.out.println("Restored state: " + originator.getState());
    }
}