问题
I was asked a question that why a byte array is not enough and NIO specially introduces a class Buffer?
What will be a good answer to this question? Is it only a kind of wrapper class which simplifies the read/write operation ?
If possible, please give us an example to demonstrate how we benefit from Buffer class which can not/hardly be done with an array.
来源：https://stackoverflow.com/questions/27729953/why-java-nio-introduces-buffer-class-specially-rather-than-using-array