POSTIN

/bin/sh

for app in jar rmic rmiregistry grepjar java; do
  # Remove binaries if not alternativeszificated yet
  [ ! -L /usr/bin/$app ] && /bin/rm -f /usr/bin/$app
  update-alternatives --install /usr/bin/$app $app /usr/bin/gcj-$app-3.2 20
done

POSTUN

/bin/sh

for app in jar rmic rmiregistry grepjar java; do
  if [ ! -f "/usr/bin/gcj-$app-3.2" ]; then
    update-alternatives --remove $app /usr/bin/gcj-$app-3.2
  fi
done