For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle.com. Technical questions should be asked in the appropriate category. Thank you!
I'm a rank amateur who just downloaded JDK. I haven't been able to access the program using the recommendation in the Beginner's Guide.
Oracle products that are Java based are typically only supported with the Oracle build of Java. In the documentation for ORDS 20.3, it states Oracle Java 8 or later. So even if you have ORDS running on openJDK, if you were to run into an issue, Oracle would not support your configuration or at least have you try to reproduce the issue using Oracle's build of the JDK.