POSTIN

/bin/sh

/usr/sbin/update-alternatives --install /usr/include/libgcj libgcj /usr/include/libgcj-4.0.1 20

POSTUN

/bin/sh

if [ ! -d /usr/include/libgcj-4.0.1 ]; then
  /usr/sbin/update-alternatives --remove libgcj /usr/include/libgcj-4.0.1
fi