Java design pattern (5) factory pattern

1. Define the abstract product class [html] package com. pattern. factory; import java. util. arrayList; public abstract class Pizza {String name; String dough; String sauce; ArrayList toppings = new ArrayList (); void prepare () {System. out. println ("Prepareing" + name); System. out. println ("Tossing dough... "); System. out. println ("Adding sauce... "); System. out. println ("Adding toppings:"); for (int I = 0; I <toppings. size (); I ++) {System. out. println ("" + toppings. get (I) ;}} void bake () {System. out. println ("Bake for 25 minutes at 350");} void cut () {System. out. println ("Cutting the pizza into diagonal slices");} void box () {System. out. println ("Place pizza in official PizzaStore box");} public String getName () {return name ;}} 2, product class [html] package com. pattern. factory; public class chicagstylecheesepizza extends Pizza {public chicagstylecheesepizza () {name = "Chicago Style Deep Dish Cheese Pizza"; dough = "Extra Thick Crust Dough "; sauce = "Plum Tomato Sauce"; toppings. add ("Shredded Mozzarella Cheese");} void cut () {System. out. println ("Cutting the pizza into square slices") ;}} [html] package com. pattern. factory; public class NYStyleCheesePizza extend Pizza {public NYStyleCheesePizza () {name = "NY Style Sauce and Cheese Pizza"; dough = "Thin Crust Dough"; sauce = "Marinara Sauce "; toppings. add ("Grated Reggiano Cheese") ;}} 3. Define the abstract factory class [html] package com. pattern. factory; public abstract class PizzaStore {public Pizza orderPizza (String type) {Pizza pizza; pizza = createPizza (type); pizza. prepare (); pizza. bake (); pizza. cut (); pizza. box (); return pizza;} protected abstract Pizza createPizza (String type);} 4. Define a factory class [html] package com. pattern. factory; import com. pattern. factory. bean. chicagstyleclampizza; import com. pattern. factory. bean. chicagstylepepperonipizza; import com. pattern. factory. bean. chicagstyleveggiepizza; public class ChicagoPizzaStore extends PizzaStore {/*** @ see com. pattern. factory. pizzaStore # createPizza (java. lang. string) */@ Override protected Pizza createPizza (String type) {if (type. equals ("cheese") {return new chicagstylecheesepizza ();} else if (type. equals ("veggie") {return new Chicago styleveggiepizza ();} else if (type. equals ("clam") {return new chicagstyleclampizza ();} else if (type. equals ("pepperoni") {return new Chicago stylepepperonipizza ();} else {return null ;}} [html] package com. pattern. factory; import com. pattern. factory. bean. NYStyleClamPizza; import com. pattern. factory. bean. NYStylePepperoniPizza; import com. pattern. factory. bean. NYStyleVeggiePizza; public class NYPizzaStore extends PizzaStore {/*** @ see com. pattern. factory. pizzaStore # createPizza (java. lang. string) */@ Override protected Pizza createPizza (String type) {if (type. equals ("cheese") {return new NYStyleCheesePizza ();} else if (type. equals ("veggie") {return new NYStyleVeggiePizza ();} else if (type. equals ("clam") {return new NYStyleClamPizza ();} else if (type. equals ("pepperoni") {return new NYStylePepperoniPizza ();} else {return null ;}}5, test class [html] package com. pattern. factory; public class PizzaTestDrive {public static void main (String [] args) {PizzaStore nyStore = new NYPizzaStore (); PizzaStore Chicago store = new ChicagoPizzaStore (); Pizza pizza = nyStore. orderPizza ("cheese"); System. out. println ("Ethan ordered a" + pizza. getName () + "\ n"); pizza = chicagstore. orderPizza ("cheese"); System. out. println ("Joel order a" + pizza. getName () + "\ n") ;}} Test Result: Prepareing NY Style Sauce and Cheese PizzaTossing dough... adding sauce... adding toppings: Grated Reggiano serving for 25 minutes at 350 Cutting the pizza into diagonal slicesp?pizza in official ?boxethan ordered a NY Style Sauce and Cheese {chicago Style Deep Dish Cheese {dough... adding sauce... adding toppings: