NIO(1)

Java NIO (New IO) is an alternative IO API for Java

组件

• Channels
• Buffers
• Selectors

Channel 

• FileChannel
• DatagramChannel
• SocketChannel
• ServerSocketChannel

Buffer

Selector

Selector允许单线程处理多个 Channel

原文：https://www.cnblogs.com/yh5920/p/11410247.html