Constants for standard charsets -- CR #4884238

[Ulf Zibis]

Am 12.04.2011 23:25, schrieb Mike Duigou:
> On Apr 12 2011, at 12:10 , Ulf Zibis wrote:
>
>> Am 12.04.2011 20:27, schrieb Mike Duigou:
>>> This change has been previously proposed but the constants were to be defined in Charset which was deemed to have too high a static initialization cost. Using a separate class, Charsets, means that the cost for initialization is only borne by those who use the class--there's virtually no incremental cost to platform initialization.
>> I can't agree with that, because you statically invoke e.g. Charset.forName("US-ASCII"), which causes the expensive initialization of the Charset class.
> It's expected that by the time Charsets is referenced that Charset will already be initialized. Charset is initialized during the setup of System.out/System.err or earlier.

Yes, and I think, initializing those 6 simple charsets is nothing against initializing Charset 
class, and even less after integrating ***Bug 100098* 
<https://bugs.openjdk.java.net/show_bug.cgi?id=100098> - Make sun.nio.cs.* charset objects 
light-weight .**

>> Please note my long waiting patches:
>> Bug 100091 - No system start for file.encoding=x-SJIS_0213
>> Bug 100092 - Speed-up FastCharsetProvider
>> Bug 100095 - Avoid 2-step lookup in sun.nio.cs charset providers
>> Bug 100098 - Make sun.nio.cs.* charset objects light-weight
> Unfortunately I don't know anything about the status of these issues.

It's a pity. Lookup and initializing charsets could be much faster.

-Ulf