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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.项羽很是感动，点头道：虞姬，谢谢你这么善解人意，能这样的宽宏大量。On the afternoon of 26th, Huawei released its first 5G mobile phone in the Chinese market!肖亮坚信，国术会没落，但是国术的精神永远不会熄灭。动画《JOJO的奇妙冒险石奥妙》的第13话～第24话将于2022年秋天在Netflix上发布全球独家先行配信。电视广播也将于2022年内开始。同时，新PV和新的视觉图也公开了。2. Return-LOADING error.Abnormal problem: The promotion information of commodities shall be subject to the information in the "Promotion" column of the commodity details page; The specific selling price of the goods shall be subject to the price on the order settlement page; If you find any abnormality in the selling price or promotion information of the active goods, it is recommended to contact the seller for consultation before purchasing.