Question

Do we need comments for control handler methods

Answer 1

The instructions say most methods need a comment. I think the control handler methods are simple enough that they don't really require one

Answer 2

If the methods are named clearly enough, they may not need any comments. Think about it from the perspective of -- "if I was seeing this code for the first time, would it be clear to me what it's doing and why?"

Note that I wanted the official Javadoc comments above public methods, but you may discover that many of your methods could (and should) be made private!