AT:

• Optimize can be run with Java Runtime Environment (JRE) 11
• Officially we will support JRE 8 & 11 only as 9 and 10 already reached EOL https://www.oracle.com/technetwork/java/java-se-support-roadmap.html
• there is a nightly jenkins job running testing that the environments work
• I can read in the technical guide about the supported JRE versions

Hint:
Check out the following guide for the migration:
https://winterbe.com/posts/2018/08/29/migrate-maven-projects-to-java-11-jigsaw/