$ sudo apt-get update
$ sudo apt-get install libjakarta-ecs-java 

libjakarta-ecs-java is installed in your system.

Make ensure the libjakarta-ecs-java package were installed using the commands given below,

$ sudo dpkg-query -l | grep libjakarta-ecs-java *

You will get with libjakarta-ecs-java package name, version, architecture and description in a table

libjakarta-ecs-java package basic information: