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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.一个汉子道：扯把草擦擦不就完了，哪来这么多废话。周夫子一本正经地答道：晌午饭是不成的了——没准备。低调做人，不要惹事，成为了裕王的原则。加勒特想让泰龙继承王位，而一个神秘的刺客却在寻求复仇。法利斯塔哀悼托宾，但想出了一个新计划。泽德想让雷恩成为高级女祭司，并揭开了她的秘密。A3.1. 1 Medical history by set.EXAMPLE 6