Have you tried it? As far as I know, Jackson 2.x works on Java 11.
Typically things work is that if something does not work, you can report issues.
I am not aware of major issues that would prevent use, although maybe
other users can share their experiences:
there may be some specific challenges due to Java modules system (JPMS).
I would also recommend using Jackson 2.10(.3) as 2.10 adds module-info
file which adds full module definitions;
2.9.5 does not have that.
-+ Tatu +-