sun-java6-jdk dependencies have loop

[ZioNemo]

Binary package hint: sun-java6-jdk

Ubuntu 10.04 with all updates installed

mcon@server:~$ lsb_release -rd
Description: Ubuntu 10.04.1 LTS
Release: 10.04

mcon@server:~$ uname -a
Linux server 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 GNU/Linux

mcon@server:~$ apt-cache policy sun-java6-jdk
sun-java6-jdk:
  Installato: 6.20dlj-1ubuntu3
  Candidato: 6.20dlj-1ubuntu3
  Tabella versione:
 *** 6.20dlj-1ubuntu3 0
        500 http://archive.canonical.com/ubuntu/ lucid/partner Packages
        100 /var/lib/dpkg/status

Installing sun-java-jdk installed (as expected!) a plethora of other packages, includig sun-java6-bin, sun-java6-jre and many others.
I installed just tha using aptitude.
All installed dependencies were dutifully marked with "A" to indicate thy were installed to fulfill dependencies.
Right after (no other installation/removal) I decided I didn't need java on this machine and I used aptitude again to completely remove (purge) sun-java6-jdk.and, to my surprise, no other package was marked for removal.

In particular neither sun-java6-bin nor sun-java6-jre will be removed.

It sems there is some loop in the dependency list that keeps the need alive.

I need to streamline this machine and I will have to check all packages.
No big deal, but annoying.

Regards