java under /usr/lib or /usr/lib64?

I installed java using script from /extra. My system is -current x64. I noticed that all files for java are under /usr/lib. The script which used to repackage java jdk is rather old. So my doubts that perhaps nowadays it would be more correct to provide diversity between 32 and 64 bit architectures. So 64 bit java on 64 bit architecture should be installed rather under /usr/lib64.