jpackage in Java 14

jpackage is a command-line tool to create native installers and packages for Java applications.

Install OpenJDK 14 on Ubuntu 20.04/18.04

curl -O https://download.java.net/java/GA/jdk14/076bab302c7b4508975440c56f6cc26a/36/GPL/openjdk-14_linux-x64_bin.tar.gz
tar xvf openjdk-14_linux-x64_bin.tar.gz
mv jdk-14 $HOME/opt/

Packing JAR as .deb

mkdir {icons,input,output,temp}