Honestly, unless the grade for that class translates into taking something directly tangible from other students, and a "java" class sounds pretty intro, I wouldn't give any thought to it. Cramming for exams and then immediately forgetting everything you hastily memorized is a-okay even though you didn't learn anything either.

A random college class, to me, isn't the kind of thing where cheating really matters. The stakes are low, it's expected that most students will do well, and everyone gets the same degree at the end. If someone wants to sabotage their own education then fine, and if it doesn't bite them later good for them.