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"Let's tell the story of three little pigs building a house tonight!"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.一个男人死缓服刑20年出狱后的故事......The main contents of this program:Number of plaintiffs: 3要知道项伯在楚军之中属于核心人物，有着超然的地位，他带来的消息和起到的作用绝非曹无伤可以匹及。