/usr/share/maven-repo/org/jfree/jcommon/debian/jcommon-debian.jar is in libjcommon-java 1.0.23-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/jfree/jcommon/debian/../../../../../java/jcommon-1.0.23.jar