Oracle Java JDK

• Download Oracle Java JDK
• Create /usr/local/java directory

sudo mkdir -p /usr/local/java

• Copy downloaded file to /usr/local/java

sudo cp -r jdk-8u51-linux-x64.tar.gz /usr/local/java/

• cd into /usr/local/java and extract downloaded file

sudo tar xvzf jdk-8u51-linux-x64.tar.gz

• Update $PATH adding this to /etc/profile

JAVA_HOME=/usr/local/java/jdk1.8.0_51
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export PATH

• Tell the system that the new Oracle Java version is available

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_51/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.8.0_51/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_51/bin/javaws" 1

• Set Oracle Java JDK default

sudo update-alternatives --set java /usr/local/java/jdk1.8.0_51/bin/java
sudo update-alternatives --set javac /usr/local/java/jdk1.8.0_51/bin/javac
sudo update-alternatives --set javaws /usr/local/java/jdk1.8.0_51/bin/java

• Choose which java you want to use with:

sudo update-alternatives --config java

• Check Java JDK version by java -version