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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 ~ ~范紫含泪点头。Construction of DatagramChannelImpl猪肉店员田劲接到长途电话，说他在内地做生物学术研究的叔叔严星，突然过世留下了一间废置工厂。田劲到工厂感觉气氛恐怖，半夜，他辗转反侧，竟然见到一名白衣女子，田劲大惊。后来他发觉她又聋又盲又哑，而此女子秀色可餐，田劲对她有了非份之想。突然那女子瞪眼向田劲，还拔刀向他狞笑，田劲认定女子是精神病变的疯狂杀手，他被追杀，便跪地求饶。女子竟拿起刀在割自己，田劲极度恐慌，撞墙自杀。原来这是严星设计的实验，正如他所料，当田劲以为女子是鬼怪时，便惊慌惧怕。当知道女子又盲又聋又哑时，便想欺凌她。当他被追杀时，便跪地求饶。女子玉宁提议严星把田劲碎尸埋掉。没想到血流满面的田劲突然站起来向严星索命。严星被吓得死去活来。What is the meaning of life? This problem has undoubtedly become an unsolved ultimate problem.However, this state can be modified.