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Groups > comp.lang.java.programmer > #17437

Re: automatically initialized to null?

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On 08/08/2012 21:20, markspace wrote:
> On 8/8/2012 12:23 PM, bob smith wrote:
>> I always forget stuff like this…
>>
>> If I have
>>
>> Bitmap[] bmps = new Bitmap[256];
>>
>> Are all 256 positions automatically initialized to null?
>
> Yes.  I'm sure that's in the JLS someplace.

"[If] there is no array initializer, and [...] a single [array
dimension expression] appears, a one-dimensional array is created
of the specified length, and each component of the array is
initialized to its default value (§4.12.5)."
       -- 15.10.1 Run-time evaluation of Array Creation Expressions

"For all reference types (§4.3), the default value is null."
                              -- 4.12.5 Initial Values of Variables

:-)

-- 
Mike Winter
Replace ".invalid" with ".uk" to reply by e-mail.

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Thread

automatically initialized to null? bob smith <bob@coolfone.comze.com> - 2012-08-08 12:23 -0700
  Re: automatically initialized to null? markspace <-@.> - 2012-08-08 13:20 -0700
    Re: automatically initialized to null? Mike Winter <usenet@michael-winter.me.invalid> - 2012-08-08 21:32 +0100
      Re: automatically initialized to null? Lew <lewbloch@gmail.com> - 2012-08-08 17:36 -0700
        Re: automatically initialized to null? Jim Gibson <jimsgibson@gmail.com> - 2012-08-08 18:06 -0700
    Re: automatically initialized to null? bob smith <bob@coolfone.comze.com> - 2012-08-09 09:12 -0700
      Re: automatically initialized to null? Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-08-09 14:34 -0400
        Re: automatically initialized to null? bob smith <bob@coolfone.comze.com> - 2012-08-10 08:53 -0700
  Re: automatically initialized to null? Roedy Green <see_website@mindprod.com.invalid> - 2012-08-09 02:38 -0700

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