Github user wangmiao1981 commented on the pull request:
https://github.com/apache/spark/pull/13110#issuecomment-219484431
@yanboliang For JAVA example, class Rating is equivalent to case class
Rating in scala example. It is not straightforward to remove class Rating in
JAVA. I remove Rating in scala, because copy & paste doesn't work in
spark-shell due to scala repl limitation.
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