Java NIO Overview

• Channel and Buffer

The standard Java IO programming interface is for byte stream and character stream

And NIO is a channel-and buffer-oriented

Data is always read from the channel to buffer, or from the buffer write channel

NiO can be understood as New io and non-blocking io, i.e. non-blocking IO

• Non-blocking IO

Non-blocking IO, which means that in a single-threaded scenario, you can continue to do other things while reading data from the channel to the buffer process. The same is true for writing data, where the program can do other things while writing the data from buffer to the channel.

• Selector

Selector is used to detect the event state of multiple channels so that single-threaded operations can manipulate data from multiple channels

Java NIO Overview