老师一边讲课一边在黑板上写字

"What was your first reaction when you saw these flying insects?" AskedEvent Handler: It consists of multiple callback methods, which constitute an application-related feedback mechanism for an event. There is no event handler mechanism in the Java NIO field for us to call or make callbacks, but we write our own code. Netty has made an upgrade in the role of event handler compared with Java NIO. It provides us developers with a large number of callback methods for us to implement corresponding callback methods for business logic processing when specific events are generated, namely ChannelHandler. The methods in ChannelHandler correspond to callbacks to each event.　　错综复杂的生活，变　　与陈扬不同,绵绵进入了一个私立贵族学校当了一名舞蹈老师。The storage period of safety assessment files for special fire protection design schemes is long-term, the storage period of fire extinguisher maintenance files is five years, and the storage period of other fire protection technical service files is 20 years.