JDK provider and version disparities
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I am using Matlab Compiler SDK to make `intlinprog` invokable from Java. I don't program in Java (yet), but have used C++/STL 15 years ago, and used OOP in VBA and Matlab. Java coding logic will probably not be a showstopper for a newbie like me; design patterns, may be more of a challenge, but my stumbling block right now is Java/JDK versions. I've read all I can about them, and now have to discover the reality by doing.
Disparity in JDK provider
I ran into my first version puzzlement in Matlab documentation on configuring the java environment:
It says to find Java version in my MATLAB installation using `version -java`. In my MATLAB, the provider is Oracle:
Java 1.8.0_181-b13 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
However, the documentation  says to get the JDK from AdoptOpenJDK. I'm wondering whether this is a mistake? I have in fact installed AdoptOpenJDK's jdk-22.214.171.124-openj9, but I haven't found an Oracle JDK at their website.
Disparity in Java versions
Since Matlab has its own requirements for JDK version, is there a problem if the system that will invoke the Java-wrapped `intlinprog` uses a different JDK? I've read that Java is largely backward compatible, but I don't know what that means in this context.
Thanks for any clarification on the above disparities, and any reconciliation needed. Meanwhile, I will forge ahead with the documentation without changing my JDK unless I run into problems.
Todd Flanagan on 29 Oct 2020
Edited: Todd Flanagan on 29 Oct 2020
You are correct that MATLAB ships with an Oracle version of the JRE. Compiler SDK for Java requires a JDK to compile Java code. MATLAB currently supoprts Java 8, so you are free to use whichever 1.8 compliant JDK you prefer.
The current supported JDK Versiion as well as compilers for other languages are listed here.