Curriculum design patterns Design patterns succinctly simple 4-2 factory coding

1 Code Walkthrough

1.1 Unused simple factory pattern code

1.2 Simple factory pattern

1.3 bank using simple reflection mode

 

 

 

 

1 Code Walkthrough

1.1 Unused simple factory pattern code

Test categories:

Package com.geely.design.pattern.creational.simplefactory; 

public  class the Test {
     / ** 
     * NOTE: This is a counter-example, 
     prior to the factory mode * no simple, requires new object. 
     * @Param args
      * / 
    public  static  void main (String [] args) {
         Connections Video Video = new new JavaVideo (); 
        Video .printVideo (); 
    } 
}

 

Parent Video:

package com.geely.design.pattern.creational.simplefactory;

public abstract class Video {
    public abstract void printVideo();
}

 

Subclass javaVideo:

package com.geely.design.pattern.creational.simplefactory;

public class JavaVideo extends Video{
    @Override
    public void printVideo() {
        System.out.println("录制java视频");
    }
}

 

子 类 netVideo:

package com.geely.design.pattern.creational.simplefactory;

public class NetVideo extends Video{
    @Override
    public void printVideo() {
        System.out.println("录制.Net视频！");
    }
}

 

Print Results:

Video recording java 

Process Finished with Exit code 0

 

 

1.2 Simple factory pattern

Test categories:

 

Package com.geely.design.pattern.creational.simplefactory; 

public  class the Test {
     / ** 
     * NOTE: This is a counter-example, 
     prior to the factory mode * no simple, requires new object. 
     * @Param args
      * / 
//     public static void main (String [] args) {
 //         Connections Video Video JavaVideo new new = ();
 //         Video .printVideo ();
 //     } 

    / ** 
     * Simple factory pattern 2 
     * here recalling the factory class parameter obtained directly factory subclass 
     * @param args
      * / 
    public  static  void main (String [] args) {
         VideoFactory videoFactory= new VideoFactory();
        Video video = videoFactory.getVideo("net");
        video .printVideo();
    }
}

 

 

 

Factory class:

 

package com.geely.design.pattern.creational.simplefactory;

public class VideoFactory {
    private Video video = null;

    public Video getVideo(String param) {
        if("java".equals(param)){
            return  new JavaVideo();
        }else if("net".equals(param)){
            return  new NetVideo();
        }else{
            return null;
        }
    }
}

 

 

 

Parent (ibid.):

Subclass javaVideo :( ditto)

Subclass netVideo (ibid.):

Print log:

 

.Net video recording! 

Finished with code Exit Process 0

 

 

 

 

1.3 bank using simple reflection mode