/usr/share/java/plexus-compiler-jikes-2.x-2.4.jar is in libplexus-compiler-java 2.4-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/plexus-compiler-jikes-2.x.jar
/usr/share/java/plexus-compiler-jikes-2.x.jar