/usr/share/java/mac_widgets.jar is in libmac-widgets-java 0.9.5+svn369-dfsg1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/mac_widgets-0.9.5+svn369.jar
/usr/share/java/mac_widgets-0.9.5+svn369.jar