class differentObj{
    private String nickname;

    public differentObj(String nickname){
        this.nickname=nickname;
    }

    public void setNickname(String nickname){
    //should be complex operation in here, i just make it simple to understand.
        this.nickname=nickname;
    }
    public String getNickname(){
        return nickname;
    }
}

class Originator {
    private String _name;
    private String _phone;
    private differentObj obj;

    public Originator(String name, String phone) {
        _name = name;
        _phone = phone;
        this.obj = new differentObj(name);
    }

    // Some operations make state changed
    public void someOperation() {
        obj.setNickname("1234");
        _name = "noboby";
        _phone = "911-911";
    }

    // recover object's state
    public void setMemento(Memento m) {
        _name = m.getName();
        _phone = m.getPhone();
        //same object with different memeory address but point to same point
        obj = m.getObj();
    }

    public Memento createMemento() {
    //how? how to due with complex object memento pattern?
    //how to save this object up?
        return new Memento(_name, _phone,obj);  //<==obj, just give the same memeory allocation to the memento, cannot back up the object.
    }

    public void showInfo() {
        System.out.println( "Nicknameobj: " + obj.getNickname() +
                        "\nName: " + _name +
                         "\nPhone: " + _phone + "\n");
    }
}
class Memento {
    private String _name;
    private String _phone;
    private differentObj obj;

    public Memento(String name, String phone,differentObj obj) {
        _name = name;
        _phone = phone;
        this.obj=obj;
    }

    public differentObj getObj() {
        return obj;
    }

    public void setObj(differentObj obj) {
        this.obj=obj;
    }


    public String getName() {
        return _name;
    }

    public String getPhone() {
        return _phone;
    }

    public void setName(String name) {
        _name = name;
    }

    public void setPhone(String phone) {
        _phone = phone;
    }
}
class Caretaker {
    private Memento _memento;

    public void setMemento(Memento memento) {
        _memento = memento;
    }

    public Memento getMemento() {
        return _memento;
    }
}
public class test222 {
    public static void main(String[] args) {
        Originator originator = new Originator("Justin", "888-8888");
        Caretaker caretaker = new Caretaker();

    // save object's memento
        caretaker.setMemento(originator.createMemento());

    originator.showInfo();
        // some operations make the object's state changed
        originator.someOperation();
        originator.showInfo();

    // use memento to recover object's state
        originator.setMemento(caretaker.getMemento());
        originator.showInfo();
    }
}