32 bit: ubuntu 12.04 and 64bit: ubuntu 13.04, both with java-7-openjdk
But anyway, I found a solution for arch 64bit: Use bin32-jre and export the java path:
export JAVA_HOME=/opt/bin32-jre/ (Added in the AUR (install script archive) now).
As I'm actually using arch and booted ubuntu only for testing, this is solved for me. :-)