Groups > comp.lang.java.programmer > #9691

Re: DataInputStream

Date	2011-11-06 17:48 -0500
From	Arne Vajhøj <arne@vajhoej.dk>
Newsgroups	comp.lang.java.programmer
Subject	Re: DataInputStream
References	<1418dd7f-d5d1-4a2c-b77b-87666f6a9591@k15g2000yqd.googlegroups.com> <9f2a8cFh1nU1@mid.individual.net> <6cf66421-77a9-4088-b810-3bcc958cc8ca@i28g2000yqn.googlegroups.com> <2ec7550a-a3d9-40a9-bca1-e1fd2586429d@g33g2000yqc.googlegroups.com> <02b9b80f-ff02-499d-8f33-056080b114bb@s9g2000yql.googlegroups.com>
Message-ID	<4eb70ea5$0$287$14726298@news.sunsite.dk> (permalink)
Organization	SunSITE.dk - Supporting Open source

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On 10/5/2011 10:17 AM, bob wrote:
> On Oct 5, 2:07 am, Robert Klemme<shortcut...@googlemail.com>  wrote:
>> On Oct 5, 8:17 am, 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;
>>
>>>                  } catch (IOException e) {
>>>                          e.printStackTrace();
>>>                          return null;
>>>                  }
>>
>>>          }
>>
>> That's OK.  Now, what's the issue?

> The issue is that it's too slow.

Rather unlikely that readFloat is the culprit.

Try replace:

InputStream is = am.open(filename);
DataInputStream dis = new DataInputStream(is);

with:

InputStream is = new BufferedInputStream(am.open(filename), 65536);
DataInputStream dis = new DataInputStream(is);

Arne

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 Arne Vajhøj <arne@vajhoej.dk> - 2011-11-06 17:48 -0500
      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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