Relacing OpenJDK with Oracle/Sun Java SDK as default java

According to some sources, Sun/Oracle JDK or JRE is slightly faster than OpenJDK.  To install the SunJDK without removing the OpenJDK is as follow:

1. Download the SDK from here
2. Install the SDK.  For example: sudo rpm -Uvih <sdk rpmfile> or sudo sh ./<sdk bin file>
3. Once it is installed, copy-paste the following script and execute it

#!/bin/sh

for FP in /usr/java/default/bin/* ; do
    NAME=${FP##*/}
    echo installing $NAME
    sudo alternatives --install /usr/bin/${NAME} ${NAME} /usr/java/default/bin/${NAME} 20000
    alternatives --display "${NAME}" | grep "${NAME}"
done