RFR: JDK-8315458 Implement JEP 463: Implicitly Declared Classes and Instance Main Method (Second Preview) [v30]

[Alan Bateman]

On Mon, 20 Nov 2023 20:45:22 GMT, Jim Laskey <jlaskey at openjdk.org> wrote:

>> Address changes from JEP 445 to JEP 463.
>> 
>> - Move from a SYNTHETIC unnamed class to a MANDATED implicit class.
>> 
>> - Don't mark class on read.
>> 
>> - Remove reflection and annotation processing related to unnamed classes.
>> 
>> - Simplify main method search.
>
> Jim Laskey has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update test

src/java.base/share/classes/java/lang/Class.java line 4847:

> 4845:     @PreviewFeature(feature=PreviewFeature.Feature.IMPLICIT_CLASSES)
> 4846:     @CallerSensitive
> 4847:     public Method findMainMethod() {

Renaming it to findMainMethod separates it from the existing getXXXMethod methods (good) but it makes it more obvious that this is a method for launchers. I'm not 100% sure that java.lang.Class is the right place for this, it feels out of place.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16461#discussion_r1400785014