… but the official command line tools had show-stopper bugs if you were deploying Java to this service, that’d been known for months, and some features couldn’t be used in Java, and the docs were only like 20% complete.
But this work-in-progress alpha (not even beta quality because it couldn’t plausibly be considered feature complete) counted as “supported” alongside other languages that were actually supported.
(This was a few years ago and this particular thing might be a lot better now, but it shows how little you can trust their marketing pages and GUI AWS dashboards)