RFR: 4860681: (bf) Add CharBuffer absolute bulk put method for CharSequence

[Brian Burkhalter]

On Mon, 1 May 2023 20:15:10 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Add to `java.nio.CharBuffer` an absolute bulk put method which takes a `CharSequence` as its source of `char`s.

Faster implementations for direct and heap buffers will be added.

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PR Comment: https://git.openjdk.org/jdk/pull/13744#issuecomment-1634436809