Object-Oriented programming

Something new that I learned from this week's class is how to create subclasses and superclasses. The idea of creating subclasses that utilize the methods from superclass is really a very neat and efficient way of handling things, as modifying the already existing superclass could create various problems. Learning about these concepts really helped me gain better insight into how class works, and would definitely be very useful for future projects/assignments that require me to build my own classes. However I think I need to do some catch up for the material on "exception", as the example offered by the instructor in course is still a little bit puzzling to me right now.  Google would probably give me some good examples on this topic.