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Groups > comp.lang.java.programmer > #8569

Re: DataInputStream

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Yes, I'm aware.  I already had to change the endian-ness when the data
was written.  Thanks.



On Oct 5, 3:12 am, Andreas Leitgeb <a...@gamma.logic.tuwien.ac.at>
wrote:
> bob <b...@coolgroups.com> wrote:
> >    float[] getVertices3(String filename) {
> >            try {
> >                    AssetManager am = this.getResources().getAssets();
> >                    InputStream is = am.open(filename);
> >                    DataInputStream dis = new DataInputStream(is);
> >                    int numfloats=dis.readInt();
> >                    float[] floatArray = new float[numfloats];
> >                    for (int ctr = 0; ctr < floatArray.length; ctr++) {
> >                            floatArray[ctr] = dis.readFloat();
> >                    }
> >                    return floatArray;
>
> Are you aware, that the DataInputStream expects a particular *binary*
> format of data coming from the stream?
>
> If the data stored in the file that you use still contains the same
> textual representation as for your previous questions, then
> DataInputStream won't be able to read it properly.
>
> You might create a separate converter utility, that reads in your
> textfile (with StreamTokenizer), then creates a binary file (writing
> out size and the individual floats through a DataOutputStream.
> That may seem roundabout, but is just right, if you *casually* need
> to hand-edit the text-file, but want speed-improved reading into your
> main application.
>
> Another option could be reading the float[] as a single object from
> an ObjectInputStream. Again. the data for that must have been created
> before by writing such an array to an ObjectOutputStream.

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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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