我应该使用DataInputStream还是BufferedInputStream [英] Should I use DataInputStream or BufferedInputStream

问题描述

我想从文本文件中读取每一行并将它们存储在ArrayList中（每行是ArrayList中的一个条目）。

I want to read each line from a text file and store them in an ArrayList (each line being one entry in the ArrayList).

到目前为止，我理解一个BufferedInputStream写入缓冲区，只有在缓冲区为空时才执行另一次读取，这样可以最小化或至少减少操作系统操作量。

So far I understand that a BufferedInputStream writes to the buffer and only does another read once the buffer is empty which minimises or at least reduces the amount of operating system operations.

我是否正确 - 我是否有意义吗？

Am I correct - do I make sense?

如果上述情况在任何情况下都会有人想要使用DataInputStream。最后我应该使用哪两个以及为什么 - 或者无关紧要。

If the above is the case in what situations would anyone want to use DataInputStream. And finally which of the two should I be using and why - or does it not matter.

推荐答案

使用正常 InputStream （例如 FileInputStream ）包装在 InputStreamReader 中，然后包装在 BufferedReader - 然后在 BufferedReader 上调用 readLine 。

Use a normal InputStream (e.g. FileInputStream) wrapped in an InputStreamReader and then wrapped in a BufferedReader - then call readLine on the BufferedReader.

DataInputStream 适用于读取基元，长度为前缀的字符串等。

DataInputStream is good for reading primitives, length-prefixed strings etc.

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