[lworld] RFR: 8346307: [lworld] Clarify identity vs value in Class, Objects, and document limitations of value objects [v9]

Thu Jun 26 16:52:43 UTC 2025

On Wed, 25 Jun 2025 22:34:51 GMT, Chen Liang <liach at openjdk.org> wrote:

> We should document explicitly that all classes, including primitives and void, are considered identity when preview features are not enabled.

Primitives and void are not classes and never have identity. 
The primitive *wrappers*  and Void  *are* classes have identity if that's what you're meaning.
Interface classes never have identity (do not have ACC_SUPER/ACC_IDENTITY).  
Interface classes with --enable-preview are reported as value classes.

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PR Comment: https://git.openjdk.org/valhalla/pull/1327#issuecomment-3009118676