Design mode 02_ Simple Factory mode

This article is in the study summary, welcome reprint but please specify Source: http://blog.csdn.net/pistolove/article/details/46400991  

This article mainly introduces the simple factory model, mainly through the form of code to show, for programmers I want to watch the code to understand than the document directly and faster.

Simple Factory is the creation mode of a class, also known as the Static Factory method (Factory) mode.

A simple factory model is a factory class that determines which product class to create based on the parameters passed in.

Use the following code to understand the simple factory pattern:

Abstract Product Roles:

Package com.design.factory;//Abstract Product role public interface  Car {public void run ();p ublic void Start ();}

Specific product roles:

Package Com.design.factory;public class Benchi implements Car {@Overridepublic void run () {System.err.println ("Benchi Run ");} @Overridepublic void Start () {System.err.println ("Benchi start");}}

Package Com.design.factory;public class Biyadi implements Car {@Overridepublic void run () {System.err.println ("Biyadi Run ");} @Overridepublic void Start () {System.err.println ("Biyadi start");}}

Package Com.design.factory;public class Dazhong implements Car {@Overridepublic void run () {System.err.println ("Dazhong Run ");} @Overridepublic void Start () {System.err.println ("dazhong start");}}

Factory class Roles:

Package Com.design.factory;public class Factory {public static Car getinstance (String clazz) {Car car = null;try {car = (C AR) class.forname ("com.design.factory." + clazz). newinstance (); catch (Exception e) {throw new RuntimeException (e);} return car;}}

Client testing:

Package Com.design.factory;public class Test {public static void main (string[] args) {Car Benchi = factory.getinstance (' Be Nchi "); Benchi.run (); Benchi.start (); System.err.println ("------------"); Car Biyadi = factory.getinstance ("Biyadi"); Biyadi.run (); Biyadi.start (); System.err.println ("------------"); Car Dazhong = factory.getinstance ("Dazhong");D Azhong.run ();D Azhong.start ();}}

Test results:

Benchi Run
Benchi start
------------
Biyadi Run
Biyadi start
------------
Dazhong Run
Dazhong start

Design mode 02_ Simple Factory mode