RFR: 8316662: Remove one allocation per conversion in Double.toString(double) and Float.toString(float) [v2]

[温绍锦]

On Fri, 22 Sep 2023 17:39:53 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> By correctly sizing an intermediate `byte[]` and making use of the internal `newStringNoRepl()` method, one allocation per conversion can be avoided when the runtime uses compact strings.
>
> Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Uppercase JLA.

src/java.base/share/classes/jdk/internal/math/FloatToDecimal.java line 508:

> 506:         try {
> 507:             return JLA.newStringNoRepl(bytes, StandardCharsets.ISO_8859_1);
> 508:         } catch (CharacterCodingException e) {

I want to know why newStringNoRepl throws CharacterCodingException instead of IllegalArgumentException. The place where I use it is forced to write redundant try_catch code.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15861#discussion_r1341700677