How to Intall Java 6 Runtime Environment on Pro (x86) ?

I didn't succeeded installing Java 6 (JRE) because of unmet dependencies.
I'm not very comfortable evaluating if any risks for my current configuration using "apt-get -f install" to fix depencies installation. Any advice ?

Anybody succeed to install JRE 6 on a x86 Readynas ?

ReadyNas:~# apt-get install sun-java6-jre
Reading package lists... Done
Building dependency tree... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
libapache-mod-php5: Depends: php5-common (= 5.2.0-8+etch13) but 5.2.0+dfsg-8+e
tch16 is to be installed
php5-mcrypt: Depends: php5-common (= 5.2.0-8+etch13) but 5.2.0+dfsg-8+etch16 i
s to be installed
squeezeboxserver: Depends: sox but it is not going to be installed
                    Depends: libvorbisenc2 but it is not going to be installed
                    Depends: libvorbisfile3 but it is not going to be installed
  sun-java6-jre: Depends: java-common (>= 0.24) but it is not going to be instal
led
                 Depends: sun-java6-bin (= 6-07-3~bpo40+1) but it is not going t
o be installed or
                          ia32-sun-java6-bin (= 6-07-3~bpo40+1) but it is not in
stallable
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution)