Conclusion

In this chapter, we have explored some of the finer points of composition and its two primary types: aggregation and association. Whereas inheritance represents a new kind of already existing object, composition represents the interactions between various objects.

The past three chapters have covered the basics of inheritance and composition. Using these concepts and your skills in the software development process, you are on your way to designing solid classes and object models. The next chapter explores how to use UML class diagrams to assist in the modeling of object models.