Perhaps you've read previous advice posted on this forum on this subject, but:
For CentOS 5.3, and possibly some others, if you do
which java
chances are you will find a symlink to gij. This symlink must be removed, and replaced with the one which Sun jre will install if there is no conflicting symlink. For CentOS x86_64, the default java must be the Sun jre 1.6 64-bit version, so that when you type
java -version
you get the echo showing the 64-bit version of Sun jre 6 is active.
Possibly, if you don't have root privilege, there may be some alias or setup which could make the Sun jre appear as the default (or an environment variable, such as the one which is required when BEA jre is present along with Sun jre).
You might think the ifort and icc installers should diagnose this situation on the primary supported distros, but so far this is not done.
