This chapter presents many guidelines that can help you in designing classes. This is by no means a complete list of guidelines. You will undoubtedly come across additional guidelines as you go about your travels in OO design.

This chapter deals with design issues as they pertain to individual classes. However, we have already seen that a class does not live in isolation. Classes must be designed to interact with other classes. A group of classes that interact with each other is part of a system. Ultimately, these systems provide value to end users. Chapter 6, “Designing with Objects,” covers the topic of designing complete systems.

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