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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 ~ ~A figure that is clear at a glance.生母与养母之间争夺孩子抚养权的故事，一幕幕感人肺腑昔日的广东十虎铁桥三厌倦世事争端，与女儿如花隐居小镇。恶霸毛良抢走了铁桥三的大洋，被铁桥三痛打，毛良借此在富家公子冯十二面前诬告铁桥三。十二找到铁桥三比试，惨败后拜师门下，在学艺过程中，卷入铁桥三和北派猴拳王的争斗当中，并与铁桥三的女儿如花发展成恋人。1. JoyToKey should be able to support any button or pole as long as it is recognized by Windows. In other words, if the keys/keys are not recognized by Windows, JoyToKey will not recognize them.(3) There are more than six registered fire engineers, of whom at least three are first-class registered fire engineers;