Re: How to buffer a text file reader?

From:

Mark Space <markspace@sbc.global.net>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 12 Jun 2008 14:49:08 -0700

Message-ID:

<uRg4k.7670$uE5.4536@flpi144.ffdc.sbc.com>

Stefan Ram wrote:

  I am trying to learn basics of file I/O.

  It seems to me that there are two ways to buffer a file reader.
  In pseudocode, the first one is:

java.io.BufferedReader( java.io.InputStreamReader( java.io.FileInputStream ))
        ??????????????
  The other one is:

java.io.InputStreamReader( java.io.BufferedInputStream( java.io.InputStream ))
                                   ???????????????????
  Which one is better as a default construction for reading from
  text files and why?

I'm not sure, but you might want to take your second example, and wrap
that in a BufferedReader.

We did some simple console/pipe IO testing here on this news group a few
months back, and what we found was that taking an existing (well-known)
IO object, and wrapping it in a BufferedWriter improved running time. I
don't think we ever figured out exactly why, but your second example
looks similar to what the well-known objects was constructed at. I
wonder if buffering both the InputStream and the InputReader could have
performance considerations.

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