Today, in my COSC362: Object-oriented Analysis & Design class, I gave a presentation on encapsulation. Actually, the assignment was to critique a flawed system design given to us by the professor. It was a group project, but my section focused on encapsulation. Below are my relevent slides:






At the end of my talk, I took a quick survey of the room and noticed that most of my peers had funny looks on their faces. Also, throughout the rest of the presentations, I noticed nobody made reference to Interfaces at all.
Was my talk over their heads? Was I wrong to relate Interfaces to the concept of encapsulation? Did the code scared them?