RFR: 8344332: (bf) Migrate DirectByteBuffer to use java.lang.ref.Cleaner [v8]

[Aleksey Shipilev]

On Wed, 22 Jan 2025 23:44:02 GMT, Brent Christian <bchristi at openjdk.org> wrote:

>> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Alan's review
>
> src/java.base/share/classes/java/nio/BufferCleaner.java line 31:
> 
>> 29: import java.lang.ref.Cleaner.Cleanable;
>> 30: 
>> 31: class BufferCleaner {
> 
> It looks like `BufferCleaner` is not meant to be instantiated. A private constructor (that throws?) would make that clear.

Correct, added some comments too.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22165#discussion_r1926586462