#Check if java is already installed
java -version 

# If java is not installed run below commands to do so
sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

#After installing, dont forget to set Java home. Just apply below commands (we assume Java is installed at /usr/lib/jvm/java-8-oracle):
echo "export JAVA_HOME=/usr/lib/jvm/java-8-oracle" >> ~/.bashrc  
echo "export PATH=$PATH:$JAVA_HOME/bin" >> ~/.bashrc





