Java version 17 is the default version and the one that is used for compilation to Jitpack. It's not included in the matrix to avoid redundancy.
After consulting a Java version releases table, I think the versions I'm supporting our sufficient. Happy to add a different version to this list if necessary.
You can see an example build using the matrix strategy here: https://github.com/growthbook/growthbook-sdk-java/actions/runs/3413477634/jobs/5680228521
Java version 17 is the default version and the one that is used for compilation to Jitpack. It's not included in the matrix to avoid redundancy.
After consulting a Java version releases table, I think the versions I'm supporting our sufficient. Happy to add a different version to this list if necessary.