The tag is present in Lintian version 2.114.55. That is the most recent version we know about.
We use semantic versions.
The patch number is a commit step indicator relative to the
release tag in our Git
You can find the detection logic for this version at commit 8053610. For merge requests, please use the latest version in the Lintian check languages/java.
The classpath listed in the jar file refers to a potential missing jar file. This could be the remnants of a build-time classpath that are not relevant for a JAR bundled in a Debian package.
Alternatively, the classpath may be correct, but the package is lacking a jar file or a symlink to it.
Note, Lintian assumes that all (relative) classpaths pointing to /usr/share/java/ (but not subdirs thereof) are satisfied by dependencies as long as there is at least one strong libX-java dependency.