4.7. Summary
In this chapter, you've learned
How to formally specify method headers, the "language" with which operations may be requested of an object, and how to call methods and properties—using dot notation—to actually get an object to perform such operations
That multiple objects often have to collaborate in carrying out a particular system function, such as registering a student for a course
That an object A can communicate with another object B only if A has a reference to B, and the various ways that such a reference can be obtained
How classes designate the public/private accessibility of their members (fields, properties, methods)
How powerful a mechanism information hiding is, both in terms of protecting the integrity of an object's data ...
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