Why can't my search engine index jdk10 javadocs?

[Martin Buchholz]

Google search seems to do a lousy job of crawling the jdk10 javadocs.

E.g. a Google search for
site:https://docs.oracle.com/javase/10/docs  inurl:ArrayList
comes up empty

Who do I complain to?  Could there be a robots.txt file?
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