java - BufferedInputStream 和 java.nio.Buffer 有什么区别？

Question

我们可以通过装饰一个FileInputStream来得到一个BufferedInputStream。而从 FileInputStream.getChannel 获取的 Channel 也可以将内容读入到 Buffer 中。

那么，BufferedInputStream 和 java.nio.Buffer 有什么区别？即，我什么时候应该使用 BufferedInputStream 什么时候应该使用 java.nio.Buffer 和 java.nio.Channel？

Answer 1

Getting started with new I/O (NIO) ，文章摘录:

A stream-oriented I/O system deals with data one byte at a time. An input stream produces one byte of data, and an output stream consumes one byte of data. It is very easy to create filters for streamed data. It is also relatively simply to chain several filters together so that each one does its part in what amounts to a single, sophisticated processing mechanism. On the flip side, stream-oriented I/O is often rather slow.

A block-oriented I/O system deals with data in blocks. Each operation produces or consumes a block of data in one step. Processing data by the block can be much faster than processing it by the (streamed) byte. But block-oriented I/O lacks some of the elegance and simplicity of stream-oriented I/O.