简单工厂——coding

Posted 2022-04-04 thiaoqueen

public abstract class Video 
    public abstract void produce();

 

public class JavaVideo extends Video 
    @Override
    public void produce() 
        System.out.println("录制Java课程视频");
    

public class PythonVideo extends Video 
    @Override
    public void produce() 
        System.out.println("录制Python课程视频");
    

public class VideoFactory 
    // 反射实现
    public Video getVideo(Class c)
        Video video = null;
        try 
            video = (Video) Class.forName(c.getName()).newInstance();
         catch (InstantiationException e) 
            e.printStackTrace();
         catch (IllegalAccessException e) 
            e.printStackTrace();
         catch (ClassNotFoundException e) 
            e.printStackTrace();
        
        return video;
    

    // 基础实现
    public Video getVideo(String type)
        if("java".equalsIgnoreCase(type))
            return new JavaVideo();
        else if("python".equalsIgnoreCase(type))
            return new PythonVideo();
        
        return null;
    

public class Test 
    public static void main(String[] args) 
// 方式一：
//        VideoFactory videoFactory = new VideoFactory();
//        Video video = videoFactory.getVideo("java");
//        if(video == null)
//            return;
//        
//        video.produce();


// 方式二：
        VideoFactory videoFactory = new VideoFactory();
        Video video = videoFactory.getVideo(JavaVideo.class);
        if(video == null)
            return;
        
        video.produce();