While Software Patterns are undeniably powerful design aids, many programmers tend to overuse them, prematurely introduce them, or implement them in unnecessarily heavyweight ways. Refactoring to Patterns encourages a simpler, more disciplined approach to using Patterns, based on the philosophy of eXtreme Programming. Using this approach, programmers wait for the right time to refactor a Pattern into a system and do so using the simplest possible Pattern implementations. In this tutorial, we will examine 5 Design Patterns and 5 cases where we might refactor these Patterns into Java code. During the process, we will investigate when it makes sense to refactor to a Pattern, and what are simple implementations of each Pattern we add. Presentation Format: Lecture and group participation. Attendee Background: This is an intermediate-level tutorial. Attendees will be expected to understand Java and have basic exposure to Design Patterns. Joshua Kerievsky is founder of and principle consultant for Industrial Logic, Inc. (http://industriallogic.com). He founded the first public patterns study group in 1995, was conference chair of Using Pattern ‘97, designed and actively teaches the Design Patterns Workshop (http://industriallogic.com/training/ili_dpclass.html) and the online Programming with Patterns workshops (http://industriallogic.com/training/pwp.html). He contributed a Refactoring to Martin Fowler’s book on the subject, and has been active in the eXtreme Programming community since its inception.

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