Github user afs commented on the issue:
https://github.com/apache/jena/pull/474
I'm trying to get a single build configuration for both java10 and java8.
I can't get Jena to build with java8 if
`<additionalOptions>-html5</additionalOptions>` is set.
It is a problem in the full build because skipping javadoc isn't an option
- the distributions include javadoc by dependency.
With java 10.0.2 (Ubuntu latest with the placeholder java11 - still waiting
for real java11): jena-elephas-common fails because:
```
[ERROR] Failed to execute goal on project jena-elephas-common: Could not
resolve dependencies for project
org.apache.jena:jena-elephas-common:jar:3.10.0-SNAPSHOT: Could not find
artifact jdk.tools:jdk.tools:jar:1.6 at specified path
/usr/lib/jvm/java-11-openjdk-amd64/../lib/tools.jar -> [Help 1]
```
(it also used MRUnit which is a retired project)
A pure maven build will put the java11 runtime (no tools.jar) on the
compile classpath.
@lewismc - am I right in concluding it worked for you in the IDE because
the java8 runtime was on the build path?
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