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The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.　　6.「来自念波的尽头」没人听她唠叨，她也只好睡觉。Don't pay attention to the title, pure clickbait title, but there are dry goods! Yesterday, I saw a "Daniel" writing an article. On the homepage recommendation, It is called "Learning Artificial Intelligence with String Elder Brother", It was quite a surprise to see the title. After all, there were still bosses willing to write AI articles in the blog park, a technical forum dominated by. Net articles. So I clicked to look at it carefully and found that the style of writing was grandiose. Well, it doesn't matter, just have dry goods. As a result, I didn't find any dry goods in the end. I saw the bibliography, which was very interesting. Put a picture here:路上，令狐冲和婆婆遇到了一群路过的江湖豪客，这数十人看到令狐冲和婆婆，有的甚是惊惧，有的惶惑失措，其中三人更是马上戳瞎自己的眼睛。艾米尔通宵为米露打造了一个梦幻般的舞蹈的舞台。第二天早上，当米露试图从位于西柏林的酒店前往巴伯斯贝格的时候，边境被关闭了，没有任何人可以通过。这天便是1961年的8月13日，柏林墙筑起的日子。米露只能登上返回法国的飞机。看着动作麻利干练的吕馨，陈启有些惊讶，这姑娘还真得能下得厨房。