Overview

This chapter continues the e-tailing case study introduced in Chapter 14, “The Strategy Pattern.”

In this chapter,

• I describe a new requirement for the case study: Add header and footer information to the printed sales ticket.

• I show how the Decorator pattern handles the requirement flexibly.

• I discuss how the Decorator pattern can be used to handle input/output (especially Java I/O).

• I describe the key features of the Decorator pattern.

• I describe some of my experience using the Decorator pattern in practice.