Summary
If today was your first exposure to object-oriented programming, it probably seems theoretical and a bit overwhelming.
Don't be alarmed. You will be using object-oriented techniques for the rest of this book, and it will become familiar as you gain more experience using it.
At this point, you should have a basic understanding of classes, objects, attributes, and behavior. You also should be familiar with instance variables and methods. You'll be using these right away tomorrow.
The other aspects of object-oriented programming, such as inheritance and packages, will be covered in more detail on upcoming days.
To summarize today's material, here's a glossary of terms and concepts that were covered:
Class— A template for an object that contains ...
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