The official Java Code Conventions document -that I could get hold of- is dated 1997 and it seems that Oracle has no updated version of it.
Oracle actually states on the conventions page that:
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Is there an official or at least a de facto official conventions that are more recent?
Note: I'm not asking here about a good or the best convention, I'm asking about the updated standard or the de facto standard if any. So, an answer should not be an opinion-based one.