The Jena build has been switched to produce Java11 bytecode.
Nothing else in the codebase has been changed so this is easily
reversible at the moment.
Using SNAPSHOT artifacts will get you Java11 bytecode.
There is currently some problems producing javadoc
One problem is [1] on early Java11 releases (11.0.1, 11.0.2, but not the
GA release 11.0.0). Update-to-date Java11 is now 11.0.9 and works
Another is overlapping packages across modules using automatic module
naming.
These do not affect the running of Jena.
Andy
[1] https://bugs.openjdk.java.net/browse/JDK-8212233
