RFR: 8361715: (bf) Improve java/nio/Buffer/GetChars.java and migrate to JUnit [v3]

[Brian Burkhalter]

On Tue, 15 Jul 2025 11:56:26 GMT, Brett Okken <duke at openjdk.org> wrote:

>> junit for CharSequence behavior of CharBuffer covering different CharBuffer implementations in various states (offset, position, limit)
>
> Brett Okken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add coverage for ByteBuffer as CharBuffer and test for codePoints

test/jdk/java/nio/Buffer/CharBufferAsCharSequenceTest.java line 137:

> 135:     @ParameterizedTest
> 136:     @MethodSource("charBufferArguments")
> 137:     void testGetChars_range(CharSequence actual, char[] expected, int start, int stop, String description) {

Another small style point is that typically underscores are not used in (method) names in preference to camel case.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26282#discussion_r2208788208