Java 8 was a thing for a long time (source administered Hadoop clusters that were - and possibly still are - stuck on Java 8).

Java 8 was analogous to 1.8…for reasons.

I wanna say Java 11 (the version after 8) came out around 2011? After that the release cadence was somewhat steady. I think Java 21 landed around 2021?

(Note: I refuse to actually look any of this up.)

Edit: my refusal to look anything up immediately bites as someone else pointed out:

1. There was a Java 10
2. It was released in 2018.
3. Both of these facts helped me remember Java 9 being released.

(Note: I continue to refuse to actually look anything up)