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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:罗伯·强生名列史上最具影响力的蓝调吉他手。在他英年早逝之前，乐迷就在猜他是否早已把灵魂卖给魔鬼The rules in the prerouting chain are stored in three tables, and the priority of rule execution in these three tables is as follows:1. Written examinationIf necessary, please download:吕老哥，《武侠世界》新一期的加印，弄好了吗？陈启打出一个电话。Once the reason is found, it is easier to solve it. There are two ways to realize it: