RFR: 8359707: Add classfile modification code to RedefineClassHelper [v4]

[Chen Liang]

On Wed, 25 Jun 2025 18:06:45 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> I copied this code for another test in the Valhalla repo and thought it would be a good utility function.  It might be better written using the Classfile API.
>> Tested with test.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use ClassFile API to replace the class name.

test/lib/RedefineClassHelper.java line 95:

> 93:         ClassDesc newClassDesc = ClassDesc.of(newClassName);
> 94:         byte[] newBytes = ClassFile.of().build(newClassDesc,
> 95:             classBuilder -> {

Can replace this lambda with `classModel::forEach` method reference.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25857#discussion_r2167390696