install jdk mint linux

1.  sudo apt-get update && apt-get remove openjdk*
2. download newest version from oracle.com
3. "unzip" jdk archive  tar -zxvf jdk-
4.  sudo mkdir -p /opt/java
5.  sudo mv jdk1.7.0_25 /opt/java
6.  sudo update-alternatives --install "/usr/bin/java" "java" "/opt/java/jdk1.7.0_25/bin/java" 1
sudo update-alternatives --set java /opt/java/jdk1.7.0_25/bin/java