There is a lot to cover when discussing OO technologies. However, you should leave this chapter with a good understanding of the following topics:

Encapsulation—Encapsulating the data and behavior into a single object is of primary importance in OO development. A single object contains both its data and behaviors and can hide what it wants from other objects.

Inheritance—A class can inherit from another class and take advantage of the attributes and methods defined by the superclass.

Polymorphism—Polymorphism means that similar objects can respond to the same message in different ways. For example, you might have a system with many shapes. However, a circle, a square, and a star are each drawn differently. Using polymorphism, ...

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