install jdk 15 ubuntu code example

Example 1: ubuntu install jdk 14

sudo add-apt-repository ppa:linuxuprising/java
sudo apt-get update
sudo apt-get install oracle-java14-installer oracle-java14-set-default

Example 2: install jdk in ubuntu

sudo add-apt-repository ppa:openjdk-r/ppa  # only Ubuntu 17.4 and earlier
sudo apt update
sudo apt install openjdk-8-jdk