factory design pattern

The book "Design Patterns" describes this in the factory method model: Defines an interface for creating objects, letting subclasses decide which class to instantiate. FactoryMethod delays the instantiation of a class to its subclasses. My understanding: The Fatorymethod pattern is a creation pattern, and defining an

abstract Factory pattern is a creative design pattern designed to create an abstract factory, which is then produced by a concrete factory that is instantiated.when to use: System products have more than one product family, and th

First, UML diagramSecond, the conceptFactory method Mode (Factory): defines an interface for creating an object, letting subclasses decide which class to instantiate. A factory method is an instantiation of a class that is deferred to its subclasses.Iii. role to be included(1) Abstract Factory(2) Detailed factory(3) Ab

Original address: http://leihuang.org/2014/12/03/factory-method/Creational modeThe production of objects needs to consume system resources, so how to produce, manage and manipulate objects efficiently is always a subject to be discussed, the creational model is related to the establishment of objects, and the model under this classification gives some guiding principles and the direction of design. Listed b

In design mode, Factory method is also relatively simple, but the application is very broad, ejb,rmi,com,corba,swing can see the shadow of this pattern, It is one of the most important patterns. In many places we see xxxfactory classes like this, so what is factory method, why use this

Whitecat implements ICat {@Ov Erride public void Eat () { System.out.println ("The White Cat is eating!"); }Package com.lyz.design.abstractfactory;/** * Idog Implementation class * @author Liuyazhuang * */public class Whitedog implements Idog {@Ov Erride public void Eat () { System.out.println ("The White Dog is eating!"); } Client: Defines a test class Package com.lyz.design.abstractfactory;/** * Testing class * @author Liuyazhuang * */public class Test

creating objects is left to the subclasses, so that the class becomes an abstract class. //安全模式创建的工厂类 var Factory = function (type, content) { if(this instanceof Factory){ var s =new this[type](content); return s; }else{ return new Factory(type,content); } } //工厂原型中设置创建对象的基类 Factory.prot

class *@authorLinjiabin on 16/4/30*/ Public classSimplefactory { Public StaticFood Createfood (String foodname) {if(Foodname! =NULL) { if(Foodname.equals ("noodles")) { return Newnoodles (); } Else if(Foodname.equals ("Rice")) { return NewRice (); } } return NULL; }} Packagetop.gabin.oa.web.design.factory;Importorg.junit.Test;/*** Simple Factory test class *@authorLinjiabin on 16/4/30*/ Public cl

1, what is the design mode:Quoted Baidu: Design pattern is a set of repeated use, most people know, through the classification purposes, code design experience Summary. Design patterns are used in order to reuse code, make code easier for others to understand, and ensure cod

RoleAbstract Factory : This role is at the heart of the factory approach pattern, which is not application-agnostic. Any factory class that creates objects in the schema must implement this interface.Specific factory : This role is the specific Java class that implements the

{ @Override public Fruit createfruit () { returnNew northfruit (); } @Override public Vegetable createvegetable () { returnNew northvegetable (); }}Specific categories: Southern Products Factory Package com.design.abstractfactory; Public class Implements Factory { @Override public Fruit createfruit () { returnNew southfruit (); } @Override public

The simple factory pattern, according to the design pattern type, belongs to the creation pattern, which is the simplest one in the factory model, which is not part of the Gof 23 design

create 10 addition instances:If you use a simple factory, you need to pass 10 symbols (such as 10 times "+") to the simple factory, since know all is addition, why repeat 10 times "+"?! Sorry, the client does not consider these, he is only responsible for the factory to pass parameters to get examples;If you use the factory