创建型模式之工厂方法模式

创建型模式之工厂方法模式

定义：Define an interface for creating an object,but let subclasses decide which class to instantiate . Factory Method lets a class defer instantiation to subclasses .

         定义一个用于创建对象的借口，让子类决定实例化哪一个类。工厂方法使一个类的实例化延迟到其子类。

 

例子：现有手机，手机分为：IPhone，Android Phone两种，使用工厂方法模式，实现产生手机对象。

工厂：

public abstract class AbstractPhoneFactory {

    public abstract <T extends Phone> T creatPhone(Class<T> c);

}

工厂的实现类：

public class PhoneFactory extends AbstractPhoneFactory {

    @Override

    public <T extends Phone> T creatPhone(Class<T> c) {

        try {

            T p = (T) Class.forName(c.getName()).newInstance();

            return p;

        } catch (Exception e) {

            e.printStackTrace();

        }

        return null;

    }

}

 

手机：

public abstract class Phone {

    public Phone(){

        System.out.println("this is a Phone");

    }

    public abstract void ring();

    public abstract void inComingPhone();

    public abstract void outGoingPhone();

}

IPhone，APhone：

public class IPhone extends Phone {

    public IPhone(){

        System.out.println("--I'm IPhone --");

    }

    @Override

    public void ring() {

        System.out.println("--I'm IPhone --ring");

    }

    @Override

    public void inComingPhone() {

        System.out.println("--I'm IPhone --inComingPhone");

    }

    @Override

    public void outGoingPhone() {

        System.out.println("--I'm IPhone --outGoingPhone");

    }

}

public class APhone extends Phone {

    public APhone(){

        System.out.println("-- I'm Android Phone --");

    }

    @Override

    public void ring() {

        System.out.println("-- I'm Android Phone --ring");

    }

    @Override

    public void inComingPhone() {

        System.out.println("-- I'm Android Phone --inComingPhone");

    }

    @Override

    public void outGoingPhone() {

        System.out.println("-- I'm Android Phone --outGoingPhone");

    }

}

测试类：

public class MainClass {

    public static void main(String[] args) {

        PhoneFactory factory = new PhoneFactory();

        IPhone iphone = factory.creatPhone(IPhone.class);

        iphone.ring();

        iphone.inComingPhone();

        iphone.outGoingPhone();

        System.out.println("\n\n");

        APhone aphone = factory.creatPhone(APhone.class);

        aphone.ring();

        aphone.inComingPhone();

        aphone.outGoingPhone();

    }

}

---------------------------------------------------- 誑逩の蝸犇 : Nothing is impossible. ----------------------------------------------------  

转载于:https://www.cnblogs.com/cody1988/archive/2012/04/20/2459346.html