Goodbye Don t Forget to Write

Goodbye! Don't Forget to Write!

Please take a moment to appreciate what happened in this chapter. You observed the development of a multisource application involving several hundred lines of code:

• The program uses awt components for input and paints graphics for its output.

• Each of the three source modules defines a subclass.

• One of the classes implements not just one interface, but two.

• There are loops and conditional statements, and an array.

• There are calls to methods that throw exceptions.

And it all made sense. You saw how it fit together. You deserve sincere congratulations for the work you had to do in Chapters 1 through 16. Without that foundation, this chapter would make no sense at all. You are well on your way toward mastery of the Java language.

This book is by no means a complete introduction. There is a lot more to be said about the language, the core classes, and programming techniques. With your strong foundation, you're now qualified to learn it all.

Were the animated illustrations beneficial? As far as I know, and as far as anybody at Sybex knows, this is the first computer book to use them. If you have any suggestions for how they can be improved, or ideas for new ones, please e-mail them to [e-mail].

Are you interested in learning more about Java? Would you like to see another volume, picking up where this one leaves off, also based on animated illustrations? Please write.