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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.Stop it. What's going on山田洋次执导[家族之苦3]正式展开制作！主演桥爪功、吉行和子、妻夫木聪、苍井优等原班人马也将回归出演。影片将于2018年5月日本公映。Let's first look at how to order a pizza:青蒜丢下一块啃光的羊排，点了点头。BBC与Amazon合拍的6集奇幻喜剧《好兆头 Good Omens》。After entering the work window, press ctrl + k to open ai preferences. Look at a keyboard increment in the general tab. Set it smaller, for example, 0.1 mm, that is to say, you can turn it up if you want to be large and turn it down if you want to be small. Also, you can open the intelligent reference line and alignment point in the view menu. According to your own drawing needs, I hope to help you, come on! !