This course uses JDK 19, but JDK 17 or later should also work.
The exercises are in the following Git repository:
git clone https://courses1852:lx+[email protected]/git/courses/reflection-1852.git
(username and password are embedded in the URL, so should not be necessary)
Note that the link is not browseable, but it does work with "git clone" or if you paste it into your IDE.
I worked in the "kabutz" branch and the original exercises are in "master". I recommend that you create your own branch off master to work in.