I'm an OpenJDK developer (http://openjdk.java.net/census#clanger) and seemingly one of the few people in this comunity that use Eclipse JDT for developing the Java libraries of the OpenJDK. So, I'll show how the Eclipse JDT can be set up for Java Development in the OpenJDK. The current status of this work can be found at this link, by the way: https://github.com/RealCLanger/OpenJDKEclipseProjects.
I'll tell a bit about the journey of how to get to a working setup which included fixing bugs in both, Eclipse JDT and the OpenJDK. I'll also share my visions of what could/needs to be added to have an even better development experience for OpenJDK developers.
Attendees that are inclined to OpenJDK development will walk away having learned how to set up the Eclipse development environment for JDT. Other attendees that are just interested in experiences with the Java Platform Module system (JPMS) will hopefully improve their knowledge about organizing JPMS projects with the Eclipse JDT.
The level of knowledge I would presume is a basic understanding of the Java Platform Module System that was introduced with Java 9.