软件设计之工厂模式

abstract class Business{
public abstract void show();
}
 
 
 
class Shortmessage extends Business{ 
    public void show() {
        System.out.println("You have a shortmessage.");
    }
}
class Network extends Business{ 
    public void show() {
        System.out.println("You have a network.");
    }
}
class Viewphone extends Business { 
    public void show() {
        System.out.println("You have a viewphone.");
    }
}


interface BusinessFactory{
Business CreatedBusiness();
}


class ShortmessageFactory implements BusinessFactory{
public Business CreatedBusiness(){