I've completed the phasing out my old json library in nostr-java, and will be releasing a new version with Jackson json library support.
It's still alpha and unstable, and I'm expecting a few de/serialisation issues here and there, I'll fix them as they pop up.
I've had amazing feedback from a random user in Japan, and invaluable help from another guy in brasil, for which I'm immensely grateful.
Also, I'm finally learning modern Javascript. 😎