Groups > comp.lang.java.programmer > #8573

Re: DataInputStream

From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: DataInputStream
Date	2011-10-05 08:58 -0700
Organization	http://groups.google.com
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On Oct 5, 4:17 pm, bob <b...@coolgroups.com> wrote:
> The issue is that it's too slow.

Ah, now we're getting closer to the point.  I'd first test whether the
slowness is caused by the underlying stream or the reading procedure.
If it's the stream (e.g. because you read unbuffered from a socket)
then you might want to add buffering or you need a faster NIC.  If
it's in the reading then look at Mark's suggestion.

> What I'm hoping for is something like this:
>
>                         byte[] b = new byte[numfloats*4];
>                         dis.read(b, 0, numfloats*4);
>                         float[] f = (float[]) b;
>                         return f;
>
> I don't know why, but it won't let me do the cast.  Any ideas?

See Patricia's reply.  Java works fundamentally different from C or C+
+.  For example, there are no pointers into memory.  I seriously
suggest you make yourself familiar with the language and the JVM.

Kind regards

robert

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Thread

DataInputStream bob <bob@coolgroups.com> - 2011-10-04 22:34 -0700
  Re: DataInputStream Robert Klemme <shortcutter@googlemail.com> - 2011-10-05 08:02 +0200
    Re: DataInputStream bob <bob@coolgroups.com> - 2011-10-04 23:17 -0700
      Re: DataInputStream Robert Klemme <shortcutter@googlemail.com> - 2011-10-05 00:07 -0700
        Re: DataInputStream bob <bob@coolgroups.com> - 2011-10-05 07:17 -0700
          Re: DataInputStream markspace <-@.> - 2011-10-05 08:27 -0700
          Re: DataInputStream Patricia Shanahan <pats@acm.org> - 2011-10-05 08:38 -0700
          Re: DataInputStream Robert Klemme <shortcutter@googlemail.com> - 2011-10-05 08:58 -0700
            Re: DataInputStream Lew <lewbloch@gmail.com> - 2011-10-05 14:52 -0700
              Re: DataInputStream Patricia Shanahan <pats@acm.org> - 2011-10-05 15:15 -0700
              Re: DataInputStream Robert Klemme <shortcutter@googlemail.com> - 2011-10-06 00:11 -0700
                Re: DataInputStream Lew <lewbloch@gmail.com> - 2011-10-06 07:08 -0700
                Re: DataInputStream Patricia Shanahan <pats@acm.org> - 2011-10-06 07:49 -0700
          Re: DataInputStream Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-10-05 21:16 -0400
      Re: DataInputStream Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-10-05 08:12 +0000
        Re: DataInputStream bob <bob@coolgroups.com> - 2011-10-05 07:12 -0700
  Re: DataInputStream Roedy Green <see_website@mindprod.com.invalid> - 2011-10-06 02:48 -0700

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