Design pattern is a named and documented method of doing something or a solution for a such certain common problem. Documentation usually covers at least the following things:

1. Name of the pattern and a list of possible other names used as synonyms
2. Context where the pattern takes place and can be used
3. Problem that can be solved with the pattern
4. Consequences of the pattern (advantages and also the disadvantages)
5. Description of the pattern and its implementation

Links on Patterns

• Good resource page on patterns having links to pattern tutorials, books, presentations, courses, etc...

• Homepage of Mark Grand, the writer of Patterns in Java, Volume 1 & 2.

• broken link Thinking in Patterns with Java, revision 0.5

• broken link Design Patterns in Java, by Prof. Ir. Marc W.F. Meurrens

• Don't forget the original Portland Pattern Repository, the original Wiki, either!

• Class diagrams of some of Gang of Four Design Patterns

• Homepage of Douglas C Schmidt. Interesting site.

• GOF (Gang of Four) Patterns with Java examples

• XML Design Patterns - Develop effective DTDs and XML Schema documents for your XML using structural design patterns.

Common Pattern groups

• FundamentalDesignPatterns
• CreationalPatterns
• PartitioningPatterns
• StructuralPatterns
• BehavioralPatterns
• ConcurrencyPatterns
• GRASPPatterns
• GUIDesignPatterns
• OrganizationalCodePatterns
• CodingOptimizationPatterns
• CodeRobustnessPatterns
• TestingPatterns