Groups > comp.lang.java.programmer > #17543

Re: automatically initialized to null?

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From	"Lew" <lew@1:261/38.remove-k2r-this>
Subject	Re: automatically initialized to null?
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  To: Mike Winter
From: Lew <lewbloch@gmail.com>

Mike Winter wrote:
> markspace wrote:
>> bob smith wrote:
>>> I always forget stuff like thisa
>>>
>>> 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
>
> :-)

See? The JLS is easy to use and very authoritative, and highly useful.

Pllptpptt! to the naysayers.

--
Lew

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Thread

automatically initialized to null? "bob smith" <bob.smith@1:261/38.remove-k2r-this> - 2012-08-09 18:44 +0000
  Re: automatically initialized to null? "markspace" <markspace@1:261/38.remove-k2r-this> - 2012-08-09 18:44 +0000
    Re: automatically initialized to null? "Mike Winter" <mike.winter@1:261/38.remove-k2r-this> - 2012-08-09 18:44 +0000
      Re: automatically initialized to null? "Lew" <lew@1:261/38.remove-k2r-this> - 2012-08-09 18:44 +0000
        Re: automatically initialized to null? "Jim Gibson" <jim.gibson@1:261/38.remove-k2r-this> - 2012-08-09 18:44 +0000
    Re: automatically initialized to null? "bob smith" <bob.smith@1:261/38.remove-k2r-this> - 2012-08-09 18:44 +0000
      Re: automatically initialized to null? "Eric Sosman" <eric.sosman@1:261/38.remove-tos-this> - 2012-08-09 19:46 +0000
        Re: automatically initialized to null? "bob smith" <bob.smith@1:261/38.remove-t9h-this> - 2012-08-10 18:39 +0000
  Re: automatically initialized to null? "Roedy Green" <roedy.green@1:261/38.remove-k2r-this> - 2012-08-09 18:44 +0000

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