## JRE 32-bit ## 
rpm -Uvh /path/to/binary/jre-7u45-linux-i586.rpm  
 ## JRE 64-bit ## 
rpm -Uvh /path/to/binary/jre-7u45-linux-x64.rpm

## java ##
alternatives --install /usr/bin/java java /usr/java/jre1.7.0_51/bin/java 200000
 
## javaws ##
alternatives --install /usr/bin/javaws javaws /usr/java/jre1.7.0_51/bin/javaws 200000
 
## Java Browser (Mozilla) Plugin 32-bit ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jre1.7.0_51/lib/i386/libnpjp2.so 200000
 
## Java Browser (Mozilla) Plugin 64-bit ##
alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jre1.7.0_51/lib/amd64/libnpjp2.so 200000

##Asegurarse que cada alternative apunte al correcto

alternatives --config libjavaplugin.so.x86_64

alternatives --config javaws

alternatives --config java