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Groups > comp.lang.java.help > #1395

Re: ByteArrayOutputStream gotcha, actually GZIPOutputStream gotcha.

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On 11/27/2011 3:07 PM, Roedy Green wrote:
> On Sun, 27 Nov 2011 14:41:08 -0800, Roedy Green
> <see_website@mindprod.com.invalid>  wrote, quoted or indirectly quoted
> someone who said :
>
>> Here a SSCCE to point out a gotcha in ByteArrayOutputStream,
>> admittedly not the most commonly used class.   It is actually a bug.
>> What I have discovered conflicts with the documentation
>
> I did some more experiments and discovered the problem is not actually
> with ByteArrayOutputStream but with GZIPOutputStream.  flush() does
> not cut it for GZIPOutputStream. It wants finish().  When you do that
> you can get the correct result after the flush but before close.
>
> I wonder why they did not call it flush.  You can call flush multiple
> times, but perhaps you can call finish only once.


Because Zip files need to write some final data, which can only be 
written after the rest of the stream is completed.

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ByteArrayOutputStream gotcha Roedy Green <see_website@mindprod.com.invalid> - 2011-11-27 14:41 -0800
  Re: ByteArrayOutputStream gotcha, actually GZIPOutputStream gotcha. Roedy Green <see_website@mindprod.com.invalid> - 2011-11-27 15:07 -0800
    Re: ByteArrayOutputStream gotcha, actually GZIPOutputStream gotcha. markspace <-@.> - 2011-11-27 16:41 -0800
      Re: ByteArrayOutputStream gotcha, actually GZIPOutputStream gotcha. Roedy Green <see_website@mindprod.com.invalid> - 2011-11-27 16:58 -0800
    Re: ByteArrayOutputStream gotcha, actually GZIPOutputStream gotcha. "John B. Matthews" <nospam@nospam.invalid> - 2011-11-27 20:13 -0500

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