抽象工厂

简介

客户端不依赖于产品实例如何被创建，实现等细节，
强调一系列相关产品对象一起使用创建对象需要大量重复代码

将一个系列的产品族放在一起

Coding

package com.yulang.design_pattern_23.abstract_factory;
public interface CourseFactory {
    Video getVideo();
    Article getArticle();
}

package com.yulang.design_pattern_23.abstract_factory;
public abstract class Video {
    public abstract void produce();
}

package com.yulang.design_pattern_23.abstract_factory;
public class PythonVideo extends Video {
    @Override
    public void produce() {
        System.out.println("python--video");
    }
}

package com.yulang.design_pattern_23.abstract_factory;
public class PythonArticle extends Article {
    @Override
    public void produce() {
        System.out.println("python -- article");
    }
}

package com.yulang.design_pattern_23.abstract_factory;
public class PythonCourseFactory implements CourseFactory {
    @Override
    public Video getVideo() {
        return new PythonVideo();
    }
    @Override
    public Article getArticle() {
        return new PythonArticle();
    }
}

package com.yulang.design_pattern_23.abstract_factory;
public abstract class Article {
    public abstract void produce();
}