Steps to reproduce:

$ java
No command java found, did you mean:
 Command cava in package cava

Expected behaviour:
command-not-found should suggest packages that provide the java executable using update-alternatives

Also see: https://wiki.debian.org/DebianAlternatives
Reported earlier at: https://matrix.to/#/!ttKPgmaucSQTHmGurC:gitter.im/$BPj1cuMLSfu_kv7HVASZeP1sIL9z9oNf-GsUpImv-ls?via=gitter.im&via=matrix.org&via=matrix.termux.club