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Summary:周菡皱眉问：就这样？黎章点头道：就这样。Grandpa said that he had never felt lonely since they fell in love. Grandma said that Grandpa always cared for her like a child.与此同时，秦国都城咸阳，两位神秘的老人正在为秦国的存亡做最后挣扎。The adapter for the interface is as follows: Sometimes we write an interface with multiple abstract methods, When we write the implementation class for the interface, All methods of the interface must be implemented, This is obviously wasteful at times, Because not all methods are what we need, Sometimes only a few are needed, In order to solve this problem here, we have introduced the adapter mode of the interface. With the help of an abstract class, the abstract class implements the interface and all methods. However, we do not deal with the original interface, but only get in touch with the abstract class, so we write a class, inherit the abstract class and rewrite the methods we need. Take a look at the class diagram:Run the test code in TestSpring again. The code has not changed, but log information is output before and after the business method runs:"Of course, it is impossible for fur to resist bullets. As long as you hit it accurately, you can kill one with a maximum of two shots. The speed is not slow, but it is not impossible to hit. If they only run on flat ground, then there is really no threat, but-they will drill the ground!"