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Re: Why No Supplemental Characters In Character Literals?

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Lawrence D'Oliveiro wrote:
>>>> Why was it decreed in the language spec that characters beyond U+FFFF are
>>>> not allowed in character literals, when they are allowed everywhere else
>>>> (in string literals, in the program text, in character and string values
>>>> etc)?

It takes TWO 'char' values to represent a supplemental character.  'char' != 
"character".

READ the documentation.

Lew wrote:
>>> Because a 'char' type holds only 16 bits.

Lawrence D'Oliveiro wrote:
>> No it doesn’t. Otherwise you wouldn’t be allowed supplementary characters in
>> character and string values. Which you are.

I have an idea for you to try - check the documentation.
<http://java.sun.com/docs/books/jls/third_edition/html/typesValues.html#4.2.1>

and you see in §4.2: "... char, whose values are 16-bit unsigned integers ..."

Mike Schilling wrote:
> Yes, it does (contain 16 bits.) It was defined to do so before there were
> supplemental characters, and there was no way to extend it without breaking
> compatibility with some older programs.
>
> You can't put a supplementary character in a char. You can put them in
> strings, but only encoded as UTF-16, i.e. into two 16-bit chars.

As the tutorials and JLS tell you, should you deign to read the documentation. 
  (It's not a bad idea to do so.)

-- 
Lew
Ceci n'est pas une fenêtre.
.___________.
|###] | [###|
|##/  | *\##|
|#/ * |   \#|
|#----|----#|
||    |  * ||
|o *  |    o|
|_____|_____|
|===========|

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Re: Why No Supplemental Characters In Character Literals? Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-02-04 19:59 +1300
  Re: Why No Supplemental Characters In Character Literals? "Mike Schilling" <mscottschilling@hotmail.com> - 2011-02-04 17:02 -0800
    Re: Why No Supplemental Characters In Character Literals? Ken Wesson <kwesson@gmail.com> - 2011-02-05 04:21 +0100
  Re: Why No Supplemental Characters In Character Literals? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-02-04 19:05 -0500
    Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 19:56 -0500
    Re: Why No Supplemental Characters In Character Literals? "Mike Schilling" <mscottschilling@hotmail.com> - 2011-02-04 16:37 -0800
  Re: Why No Supplemental Characters In Character Literals? "Mike Schilling" <mscottschilling@hotmail.com> - 2011-02-04 00:22 -0800
    Re: Why No Supplemental Characters In Character Literals? Roedy Green <see_website@mindprod.com.invalid> - 2011-02-04 15:03 -0800
    Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 18:04 -0500
    Re: Why No Supplemental Characters In Character Literals? Lew <noone@lewscanon.com> - 2011-02-04 07:49 -0500
    Re: Why No Supplemental Characters In Character Literals? Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> - 2011-02-05 11:26 +1300
  Re: Why No Supplemental Characters In Character Literals? markspace <nospam@nowhere.com> - 2011-02-04 16:37 -0800
    Re: Why No Supplemental Characters In Character Literals? Ken Wesson <kwesson@gmail.com> - 2011-02-05 04:26 +0100
      Re: Why No Supplemental Characters In Character Literals? Ken Wesson <kwesson@gmail.com> - 2011-02-05 04:47 +0100
      Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 22:32 -0500
    Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 20:06 -0500
  Re: Efficient unicode string implementation was: Re: Why No Supplemental Characters In Character Literals? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-02-04 19:13 -0500
    Re: Efficient unicode string implementation was: Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 20:08 -0500
  Re: Why No Supplemental Characters In Character Literals? Daniele Futtorovic <da.futt.news@laposte.net.invalid> - 2011-02-04 18:37 +0100
    Re: Why No Supplemental Characters In Character Literals? markspace <nospam@nowhere.com> - 2011-02-04 11:27 -0800
  Re: Efficient unicode string implementation was: Re: Why No Supplemental Characters In Character Literals? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-02-04 17:28 -0500
  Re: Why No Supplemental Characters In Character Literals? "Mike Schilling" <mscottschilling@hotmail.com> - 2011-02-04 09:10 -0800
    Re: Efficient unicode string implementation was: Re: Why No Supplemental Characters In Character Literals? Roedy Green <see_website@mindprod.com.invalid> - 2011-02-04 15:22 -0800
      Re: Efficient unicode string implementation was: Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 18:41 -0500
    Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 18:12 -0500
    Efficient unicode string implementation was: Re: Why No Supplemental Characters In Character Literals? Tom Anderson <twic@urchin.earth.li> - 2011-02-04 21:30 +0000
      Re: Efficient unicode string implementation was: Re: Why No Supplemental Characters In Character Literals? Ken Wesson <kwesson@gmail.com> - 2011-02-05 04:25 +0100
    Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 12:33 -0500
    Re: Why No Supplemental Characters In Character Literals? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-02-04 13:44 -0500
      Re: Why No Supplemental Characters In Character Literals? Roedy Green <see_website@mindprod.com.invalid> - 2011-02-04 15:08 -0800
  Re: Why No Supplemental Characters In Character Literals? Lew <lew@lewscanon.com> - 2011-02-04 12:43 -0800
  Re: Why No Supplemental Characters In Character Literals? Arne Vajhøj <arne@vajhoej.dk> - 2011-02-04 10:49 -0500
  Re: Why No Supplemental Characters In Character Literals? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-02-04 08:04 -0500

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