I had a professor in college who was "the expert in java programming language". He had a unique way of teaching.

P: So you save your java file and run this command.
*Some error occurs*
Me: But this is showing some error
P: Exactly. I wanted to show this exact same error so that you learn that this is not how its done. I will let you figure it out how its done and it will be your assignment for the day. Class dismissed.