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Although there are subclasses in java that implement the interfaces of the parent class, But I think javascript can be different from java, It is possible that the parent class in java is an empty class, Subclasses to implement the interface of the parent class, in javascript, I think the common code is completely written in the parent function. If the business logic needs to be changed in the future, or new business logic is added, we can completely use subclasses to rewrite the parent class, so the code has strong scalability and is easier to maintain. Since I am not a professional java, please understand if there is any mistake in describing the knowledge points in java ~ ~他艰难地咽了下口水，从侧面察看林聪嘴唇、鼻梁，顿觉无处不像女人。本剧讲述了由珍妮·提恩坡苏皖饰演的总理秘书和Por饰演的总理保镖之间发生的一系列浪漫爱情故事。Common goal: Through the layer-by-layer decomposition of strategic objectives and key tasks, performance management is used as a means to ensure that the company has the same desire from top to bottom.Apostle Pearl Collection杨长帆看得清楚，不用费多大心思就猜出事情的原委，他回身望了望空旷的海湾，一个无耻的想法就这么冒了出来。