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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 ~ ~就算张家的亲戚、朋友来了，林大爷也都是认识的，他会亲自带着他们去张家。妻儿对他而言是最为重要的人，现在被蒯彻挟持，可以说是投鼠忌器。然后张槐洗了一把，换了身衣裳，清清爽爽地上桌吃饭，跟众人叙别后诸样事。欢迎广大书友光临阅读，最新、最快、最火的连载作品尽在。The second category: between the two categories.盲女叶轻如意外怀了真龙河神之子。她本是最平凡的存在，却偶然与河神相恋…