For Internet archiving purposes: After installing Sun JRE (rpm -Uvh jre-7u5-linux-x64.rpm), the properly way to use it is setting up the alternatives links:

update-alternatives –install java java /usr/java/jre1.7.0_05/bin/java 60 \
–slave jre jre /usr/java/jre1.7.0_05 \ 
–slave rmiregistry rmiregistry /usr/java/jre1.7.0_05/bin/rmiregistry \
–slave tnameserv tnameserv /usr/java/jre1.7.0_05/bin/tnameserv \
–slave rmid rmid /usr/java/jre1.7.0_05/bin/rmid \
–slave ControlPanel ControlPanel /usr/java/jre1.7.0_05/bin/ControlPanel \
–slave policytool policytool /usr/java/jre1.7.0_05/bin/policytool \
–slave keytool keytool /usr/java/jre1.7.0_05/bin/keytool \
–slave javaws javaws /usr/java/jre1.7.0_05/bin/javaws

If you have more than one JRE, you can choose the new one with:

update-alternatives –config java