postrm is in libgcj14 4.8.2-19ubuntu1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | #! /bin/sh -e
case "$1" in
    remove|purge)
        # only purge if no other library is installed.
        if [ -z "$(ls /usr/lib/libgcj.so.14* 2>/dev/null)" ]; then
	    rm -f /var/lib/gcj-4.8/classmap.db
	    rmdir --ignore-fail-on-non-empty /var/lib/gcj-4.8 2>/dev/null || true
	fi
esac
# Automatically added by dh_makeshlibs
if [ "$1" = "remove" ]; then
	ldconfig
fi
# End automatically added section
 |