All of our servers currently with running with Java 8 as standard, however, as each server runs on its own dedicated container - you have the option if you would like to run your server on Java 11 instead. If you would prefer to have your server on Java 11 rather than Java 8 - please contact Support via Support ticket and our team will be more than happy to change your service over!
Please ensure if you are using plugins - that they are supported for Java 11.