jltxgcy的专栏

一、整体代码        Beverage.javapublic abstract class Beverage { String description = "Unknown Beverage"; public String getDescription() { return description;

一、整体代码       Iterator.javapublic interface Iterator { boolean hasNext(); Object next();}      DinerMenuIterator.javapublic class DinerMenuIterator implements Iterator { MenuItem[]

一、整体代码      CaffeineBeverageWithHook.javapublic abstract class CaffeineBeverageWithHook { void prepareRecipe() { boilWater(); brew(); pourInCup(); if (customerWantsCondiments()) {

一、整体代码     HomeTheaterFacade.javapublic class HomeTheaterFacade { Amplifier amp; Tuner tuner; DvdPlayer dvd; CdPlayer cd; Projector projector; TheaterLights lights; Screen screen; Popcor

一、整体代码       Duck.javapublic interface Duck { public void quack(); public void fly();}       Turkey.javapublic interface Turkey { public void gobble(); public void fly();}   

一、整体代码      Command.javapublic interface Command { public void execute(); public void undo();}      LightOffCommand.javapublic class LightOffCommand implements Command { Light ligh

一、整体代码      PizzaStore.javapublic class PizzaStore { PizzaFactory factory;//多用组合，少用继承 public PizzaStore(PizzaFactory factory) { this.factory = factory;

一、整体代码        Singleton.javapublic class Singleton { private static Singleton uniqueInstance; // other useful instance variables here private Singleton() {} public static synchronized

一、整体代码       PizzaStore.javapublic abstract class PizzaStore { abstract Pizza createPizza(String item);//面向抽象编程，对扩展开放，对修改封闭。 public Pizza orderPizza(String type) { Pizza pizza = create

一、简单工厂模式       PizzaStore.javapublic class PizzaStore { SimplePizzaFactory factory;//多用组合，少用继承 public PizzaStore(SimplePizzaFactory factory) { this.factory = fac

一、整体代码       Subject.javapublic interface Subject { public void registerObserver(Observer o); public void removeObserver(Observer o); public void notifyObservers();}

一、整体代码       Duck.javapublic abstract class Duck { public FlyBehavior flyBehavior; public QuackBehavior quackBehavior; public Duck() { } public abstract void display(); pu

一、整体代码       State.javapublic interface State { public void insertQuarter(); public void ejectQuarter(); public void turnCrank(); public void dispense();}       SoldState.javap