Application scenarios of bytebuffer dispersion and aggregation

Scattered/clustered I/O is useful for dividing data into several parts. For example, you may write a network application that uses message objects.ProgramEach message is divided into a fixed-length header and a fixed-length body. You can create a buffer that can accommodate the header and a buffer that can accommodate the hard body. When you put them into an array and use distributed reads to read messages into them, the header and body are neatly divided into the two buffers.
The convenience we get from the buffer zone is equally effective for the buffer array. Because each buffer zone tracks the amount of data it can accept, the first buffer zone with space to accept data is automatically located for Distributed reads. After the buffer is filled up, it will be moved to the next buffer zone.