<AWT Dev> RFR: 8271456: Avoid looking up standard charsets in "java.desktop" module [v2]

[Alexey Ivanov]

On Tue, 3 Aug 2021 19:37:04 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> This is a request to clean up a desktop module as was done in JDK-8233884 for "java.base" module.
>> 
>> In many places standard charsets are looked up via their names, for example:
>> absolutePath.getBytes("UTF-8");
>> 
>> This could be done more efficiently(x20 time faster) with use of java.nio.charset.StandardCharsets:
>> absolutePath.getBytes(StandardCharsets.UTF_8);
>> 
>> The later variant also makes the code cleaner, as it is known not to throw UnsupportedEncodingException in contrary to the former variant.
>> 
>> Tested by the desktop headless/headful tests on linux/windows.
>
> Sergey Bylokhov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
> 
>  - Merge branch 'master' into JDK-8271456
>  - Initial fix for JDK-8271456

Marked as reviewed by aivanov (Reviewer).

src/java.desktop/windows/classes/sun/awt/windows/WDataTransferer.java line 270:

> 268:                     charset = new String((byte[])localeTransferable.
> 269:                         getTransferData(javaTextEncodingFlavor),
> 270:                                          StandardCharsets.UTF_8);

Suggestion:

                        getTransferData(javaTextEncodingFlavor),
                                        StandardCharsets.UTF_8);

The parameter on the second line should probably be aligned with the first parameter as it's done in the snippet above.

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PR: https://git.openjdk.java.net/jdk/pull/4951