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Newsgroups: comp.lang.java.programmer
From: Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at>
Subject: Re: Using Enumerated Types as Array Indexes
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Date: 17 Aug 2011 13:28:18 GMT
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Arved Sandstrom <asandstrom3minus1@eastlink.ca> wrote:
> On 11-08-17 12:45 AM, Lew wrote:
>> On Tuesday, August 16, 2011 8:20:05 PM UTC-7, markspace wrote:
>>> On 8/16/2011 6:56 PM, Arne Vajh�j wrote:
>>>> byte/short/int/long integer types
>>> OK, you mean for indexes?  char works too, and long really doesn't -- it 
>>> has to be cast to an int. [...]
>> JLS 10: [...]
>> IOW, you never index arrays with a byte, char or short. [...]
> I'm feeling slow this morning: how do we get problems with byte->int,
> short->int, or char->int again?

array-indexing takes integers.  That you can also throw byte/short/char
values at them without cast doesn't mean that arrays "take" those, but
only that such values get automatically converted to int before being
taken by the array for indexing.

An example for something really "taking" byte-values:
  foo(byte b) { ... }