Re: Why No Supplemental Characters In Character Literals?
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 fen??tre.
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