We divided the application versions into different packages, each package is related to an exercice where we implement a new feature for the program.
Therefore, to launch the latest version, execute the main class in the exercice4 package. Packages exercice2_3 and exercice1 also work but do not handle a feature where we added an intermediate station for the trains.
The initial version (package "train") occasionally freezes after a train derails at a station. We have addressed this issue and renamed it to exercice1.
Debugging was challenging as it was difficult to track parameters and anticipate their behavior, given that thread actions vary each time the code is run.