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狼有啥好怕的？狼来了，我正好捉了它炖肉吃。19. Memento)王勇小心翼翼的把书签夹到《武侠世界》中，仔细收好了这本杂志。For example, in Java, the Selector's select () method is used to implement this synchronous blocking operation waiting for an event to occur. In the implementation of select () under Linux operating system, a) will call epollCtl (epfd, opcode, fd, events) to register the events that have been registered in Initiation Dispatcher into Linux system, where fd means Handle and events means Handle events that we are interested in; B) Synchronize the occurrence of a blocked wait registered event by calling the epollWait method. Events on different event sources may occur at the same time. Once an event is triggered, the epollWait method will return. C) Finally, find the associated SelectorKeyImpl object by the event that occurred, set the event that occurred to the ready state, and then put the SelectorKeyImpl into the selectedSet. In this way, we can get the event-ready SelectorKeyImpl collection through the Selector.selectedKeys () method.The maintenance of exceptions is much simpler. It is mainly to handle faults. It should be noted here that all faults should be handled with documents to check, that is to say, the application, approval, processing and other processes should be completed. If it is urgent, it should be supplemented later, which is helpful for internal audit of related events.《假面骑士第三十一季 假面骑士01》令和假面骑士第1作Second: Look at the class from an external perspective. Remember not to require others to know how you implement a method before using my class.