public static void main(String[] args) {
Originator originator = new Originator();
originator.setState("ON");
originator.show();
CareTaker careTaker = new CareTaker();
careTaker.setMemento(originator.createMemento());
originator.setState("OFF");
originator.show();
originator.setMemento(careTaker.getMemento());
originator.show();
}
public static void main(String[] args) {
Caretaker caretaker = new Caretaker();
Originator originator = new Originator();
originator.set("State1");
originator.set("State2");
caretaker.addMemento(originator.saveToMemento());
originator.set("State3");
caretaker.addMemento(originator.saveToMemento());
originator.set("State4");
originator.restoreFromMemento(caretaker.getMemento(1));
}
public static void main(String[] args) {
Originator org = new Originator();
org.setStat("ON");
Memento memento = org.createMemento();
Caretaker c = new Caretaker();
// memento 所有接口都对外可见......导致数据被串改危险
// memento.setStat("abc");
c.saveMemento(memento);
org.setStat("OFF");
org.restoreMemento(c.retrieveMemento());
System.out.println(org.getStat());
}
