I am upset that the class made is seem like documentation was solely for Javadoc and focused only on documenting what the method/class does.  I would've also liked if the student was free to choose if they wanted to use Array or ArrayList or whatever they thought would be best. Often times in projects, like you said, the best data structure/type was not used and the student had to stick to it. And the fact that we were memorizing code without knowing what exactly it did (specially early on in the semester) bugged me too.

/rant.

Kshitij Parajuli