theshen

package { public class Singleton { private static var instance:Singleton; public function Singleton(p:PrivateClass) { if(!p) { throw new Error("不能直接实例化Singleton，请使用getInstance方法.");

发布者package { public interface Subject { function addObserver(observer:Observer):void; function removeObserver(observer:Observer):void; function notifyObservers():void; }}观察者p

被装饰的组件，Beverage是抽象类(as3不支持抽象类)package { //Beverage是抽象类，不要直接new Beverage public class Beverage { protected var _price:Number; protected var _description:String; public function Bevera

抽象产品类package { //cake是抽象类 public class Cake { protected var _name:String; public function Cake() { } internal function prepare():void { trace("Preparing " + name); }

package { //cake是抽象类 public class Cake { protected var _name:String; public function Cake() { } internal function prepare():void { trace("Preparing " + name); } inte

package com.pizza { import com.pizza.ingredient.Cheese; import com.pizza.ingredient.Dough; import com.pizza.ingredient.Sauce; //Pizza是抽象类 public class Pizza { protected var _name:String;