install java and java jdk on ubuntu code example
Example 1: java 8 install ubuntu
sudo apt-get install openjdk-8-jdk
Example 2: install java ubuntu
sudo apt install default-jre # installs java
sudo apt install default-jdk # installs javac
sudo apt-get install openjdk-8-jdk
sudo apt install default-jre # installs java
sudo apt install default-jdk # installs javac