OOPS! Deep Dive 1: Classes, Objects & Constructors (Java)
https://drillthestack.com

lesson/             the code from the video
practice-starter/   the practice task: open the Ticket file and follow the comments
practice-solution/  one solution (try it yourself first!)

Needs Java 17 or newer.
In any folder:  javac -d out *.java   then   java -cp out Main
