package javaDesignpattern.memto; public class Orginal { private String string; public String getString() { return string; } public void setString(String string) { this.string = string; } // 创建备忘录 public Memento createMemeto() { return new Memento(this.string); } // 恢复备忘录中的string值 public void restoreMemeto(Memento memeto) { this.string = memeto.getString(); } }