Comments on Create Scheduler jobs in Java

Maybe a better title would: "Create Scheduler jobs in Java"?

 Find a complete example here:  https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-watchlist/xwiki-platform-watchlist-api/src/main/java/org/xwiki/watchlist/internal/job/WatchListJob.java

You should use the  macro.

Note: always use references and not full URLs. This allows renaming.

 The script to excute is set in the Job Script property of the  XWiki.SchedulerJobClass object, it is a groovy script.

Would be nice to show a screenshot here.

 Use Java in the job script

I don't understand this part. It's not java it's Groovy!

Ideally the examples should be converted to groovy since it's groovy and not java.

I feel it would be nicer to code an example and do a tutorial. This looks like this should be improved and put in the reference documentation for the scheduler app IMO.