Summary
In this chapter, we covered more theory than in any other chapter. If you haven't memorized everything or some of the code seemed a bit too in-depth, then you have still succeeded completely.
If you just understand that OOP is about writing reusable, extendable, and efficient code through encapsulation, inheritance, and polymorphism, then you have the potential to be a Java master.
Simply put, OOP enables us to use other people's code, even when those other people were not aware of exactly what we would be doing at the time they did the work.
All you must do is keep practicing because we will constantly be using these same concepts over and over again throughout this book, so you do not need to have even begun mastering them at this point. ...
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