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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 ~ ~当三个朋友通过生死攸关的情况找到友谊时，友谊的力量就到了。Ctrl + M: Repeat previous command至于燕国和辽东不必担心，想必我们按兵不动，停止攻伐之后。从英国留学回来的包小波是安居老板的独生子，典型的85后小开，由于经营咖啡馆失败，而被父亲包达仁要求到安居做见习总经理。尹旭轻轻摇头：两座城池既然是互为犄角，攻克起义，让另外一座孤立无援自然最好不过。Hello, landlord. Open the chat interface with that person's QQ number-then click Report-Fill in the reason for reporting-Fill in the evidence for reporting-Review-Receive the notice