RFR: 8369428: Include method name in 'does not override or implement' diagnostics

[Chen Liang]

On Wed, 8 Oct 2025 14:12:57 GMT, Liam Miller-Cushon <cushon at openjdk.org> wrote:

> Hi,
> 
> Please consider this small improvement to `compiler.err.method.does.not.override.superclass` diagnostics, to include the method name.
> 
> Before:
> 
> 
> T.java:2: error: method does not override or implement a method from a supertype
>   @Override
>   ^
> 
> 
> After:
> 
> 
> T.java:2: error: f() does not override or implement a method from a supertype
>   @Override
>   ^
> 1 error

I think a better analogy would be `compiler.err.default.overrides.object.member`: it is also a problematic method overriding. It reports the method, the declaring class's kind (class or interface), and the declaring class in the current source file. I think we can just emulate that message here.

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PR Comment: https://git.openjdk.org/jdk/pull/27692#issuecomment-3382758741