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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.大家一看，顿时发现真是如此。由乔恩·波克坎普编剧，迈克尔·W·沃特金斯执导，詹姆斯·斯派德，梅根·布恩，迪亚哥·克莱特霍夫，瑞安·艾戈尔德，乌尔里奇·汤姆森，阿米尔·阿里森，莫赞·玛诺，哈里·列尼斯等人主演的悬疑犯罪类美剧。青鸾公主大吃一惊，颤声问道：你……就是你杀了阿图？黎章抬了下眼皮，懒得理她。/strut (show off)等到了孔雀军前，当头一名四羽将军滚下马来参见过，然后问道：公主，可要末将挥军杀过去？青鸾公主已经恢复常态。林聪用力点头。