There's a closed pull request on the void-packages repository

New package: oracle-jdk-11-11.0.2
https://github.com/void-linux/void-packages/pull/8634

Description:
I think this is mostly complete.  How do I handle the icons and the .desktop files? They will conflict with the oracle-jdk package.  One option is to make that part of the alternatives, another is to create an oracle-jdk-common package for both to depend on.