The following resources contain additional information on Design Patterns. Please use them to get more in-depth knowledge on this.
Wiki Page for Design Patterns - Check out design patterns in a very generic way
Java Programming/Design Patterns - A very good article on Design Patterns
The JavaTM Tutorials -The Java Tutorials are practical guides for programmers who want to use the Java programming language to create applications.
JavaTM 2 SDK, Standard Edition - Official site for JavaTM 2 SDK, Standard Edition
Java DesignPatterns - Short articles on Design Patterns.
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