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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 ~ ~Unicom《请你笑吧》讲述因白手起家的父亲而过得富裕卻因破产全家寄住在司机家中所展开的故事...... 《请你笑吧》是部标榜趣味欢笑和温暖安慰的家庭电视剧。剧中李奎汉饰演和富家女徐贞仁(李敏贞)订婚,卻因贞仁家的破产而遭父母反对，且因犹豫不决的个性关系而和她分手，但卻无法忘记她而不断碍徐贞仁新恋情的惹人眼的男人李汉世一角。李汉世是个贪心且嫉妒心强的人，但对徐贞仁却有着纯真的心。但是，只见齐天大圣不喜反怒，仰天一声怒吼，声音桀骜暴躁，还有一丝凄厉悲伤。It is worth mentioning that in the next two 15-year targets, there is no longer the target of doubling GDP, but a new target of a beautiful China has been added.　　改编自同名漫画《恋爱铃》，描述一位软体开发工程师打造出一套应用程式，能在使用者周遭有人对他们滋生浪漫情愫时给予提醒。　　Spellbinder是冒险、幻想和娱乐的超强结合。