RFR: 8361715: (bf) Improve java/nio/Buffer/GetChars.java and migrate to JUnit [v11]

[duke]

On Fri, 25 Jul 2025 18:47:21 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:
> 
>   code review comments

@bokken 
Your change (at version 356a9b0fe5d1656018eb51432747ab9a58ea060f) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk/pull/26282#issuecomment-3126863666