- Open terminal ( Ctrl + Alt + t )
- Type sudo gedit .bashrc.
- Enter password of ubuntu user.
- Go to last line of the file.
- Type below code in new line export JAVA_HOME=enter_java_path_here export PATH=$JAVA_HOME/bin:$PATH eg: export JAVA_HOME=/home/pranav/jdk1.8.0_131 export PATH=$JAVA_HOME/bin:$PATH.
- Save the file.