Easy Steps to to Switch to Sun Oracls' JDK

I use Linux Mint 15

1) Download JDK1.7, and install it into any directory of your choice, mine was /home/byorn/Programs/jdk1.7

2) Set Java Home
    sudo vim /home/byorn/.bash_profile
   
   export JAVA_HOME=/home/byorn/Programs/jdk1.7.0_21
   export PATH=$PATH:$JAVA_HOME/bin


3) sudo update-alternatives --install "/usr/bin/java" "java"  "/home/byorn/Programs/jdk1.7.0_21/bin/java" 1

4) sudo update-alternatives --config java

and select your option.

To Test type:  java -version