Use java runtime on newer JVM

I have a matlab executable that I run in a Tomcat servlet. My development machine is Ubuntu 16.04 with Oracle JDK 8.xx. I am using Matlab 2019b and the correspnding MCR. The servlet runs without issue. Now I'm moving the system to AWS, which requires me to configure a new Ubuntu image. I don't have any way to install Oracle JDK 8 (or 9) on this machine, as they are end-of life. The servlet seg faults in the jdk library, presumably because it was compiled in JDK 8. I have installed open-jdk-8 on the AWS image, but it seems like there should be a more elegant solution.