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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.Article 8 Actions to Avoid CollisionsCtrl + N: create a new graphic fileNetflix乱糟糟小姐由《Go Back夫妇》权慧珠编剧执笔，预计接档《爱的迫降》播出。一时间，慷慨激昂的声音响彻光明顶。最后，他又带回了四颗人头，秦淼他们几个也毫发无损地回来了。