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Java design patterns 101

David Gallardo, Author
David Gallardo is a contributing developerWorks author.

Summary:  Design patterns capture the experience of expert software developers and present common recurring problems, their solutions, and the consequences of those solutions in methodical way. This tutorial explains why patterns are useful and important for object-oriented design and development; how patterns are documented, categorized, and cataloged; when they should be used; what some important patterns are; and how they are implemented.

Date:  08 Jan 2002
Level:  Introductory
PDF:  A4 and Letter (62 KB | 18 pages)Get Adobe® Reader®

Activity:  96425 views
Comments:  

Wrapup

Summary

Design patterns are a valuable tool for object-oriented design for a number of important reasons:

  • Patterns provide "...a solution to a problem in a context." ( Design Patterns, Gamma, Helm, Johnson, and Vlissides).

  • Patterns capture the expertise of experienced designers in a methodical way and make them available as design tools and learning tool for non-experts.

  • Patterns provide a vocabulary for discussing object-oriented design at a significant level of abstraction.

  • Patterns catalogs serve as a glossary of idioms that help in understanding common, but complex solutions to design problems.

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