| 程序包 | 说明 | 
|---|---|
| io.netty.channel | The core channel API which is asynchronous and event-driven abstraction of
 various transports such as a
 NIO Channel. | 
| io.netty.channel.embedded | A virtual  Channelthat helps wrapping a series of handlers to
 unit test the handlers or use them in non-I/O context. | 
| io.netty.channel.nio | NIO-based channel
 API implementation - recommended for a large number of connections (>= 1000). | 
| 限定符和类型 | 类和说明 | 
|---|---|
| protected class  | AbstractChannel.AbstractUnsafeUnsafeimplementation which sub-classes must extend and use. | 
| 限定符和类型 | 方法和说明 | 
|---|---|
| Channel.Unsafe | Channel. unsafe()Returns an internal-use-only object that provides unsafe operations. | 
| Channel.Unsafe | AbstractChannel. unsafe() | 
| 限定符和类型 | 方法和说明 | 
|---|---|
| Channel.Unsafe | EmbeddedChannel. unsafe() | 
| 限定符和类型 | 接口和说明 | 
|---|---|
| static interface  | AbstractNioChannel.NioUnsafeSpecial  Unsafesub-type which allows to access the underlyingSelectableChannel | 
| 限定符和类型 | 类和说明 | 
|---|---|
| protected class  | AbstractNioByteChannel.NioByteUnsafe | 
| protected class  | AbstractNioChannel.AbstractNioUnsafe |