Set Java 8 Environment in Linux Ubuntu (Quick Essentials)

sudo gedit /etc/profile

JAVA_HOME=/usr/local/java/jdk1.8.0_77
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
JRE_HOME=/usr/local/java/jdk1.8.0_77/jre
PATH=$PATH:$HOME/bin:$JRE_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH

. /etc/profile

sudo nano .bashrc

export JAVA_HOME="/usr/local/java/jdk1.8.0_77/"
export PATH="$JAVA_HOME/bin:$PATH"

source ~/.bashrc

java --version