user.java

来自「《Java与模式》一书的源代码」· Java 代码 · 共 24 行

package com.javapatterns.memento.wideandnarrow2;

public class User
{
    class ConcreteClass implements Narrow
    {
        private void operation1()
        {
            System.out.println("operation1()");
        }

        private void operation2()
        {
            System.out.println("operation2()");
        }
    }


    public Narrow getConcreteClass()
    {
        return (Narrow)new ConcreteClass();
    }
}