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•希望之夢（菅野美穗）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 ~ ~"Enterprises should focus on the attack itself and make plans in advance to deploy the response process. They can also collect internal attack information and provide it to suppliers, thus forming a common attack confrontation alliance," Tsantes suggested.葫芦等几个大的全部转身。(five) the amount of illegal is huge;