In a typical implementation of the Observer design pattern, you might want to have a Subject type and an Observer type. Here’s a code snippet that illustrates this.

The template method design pattern allows you to define the skeleton of an algorithm in a base class and defer the details to subclasses ...

EJB Design Patterns goes beyond high-level design pattern descriptions into critical EJB-specific implementation issues, illustrated with source code implementations. The book contains a catalog of ...

When Design Patterns Are Evil Have you ever been on a project in which all of your team members have just gone through an intense week of design pattern training? It's painful, as the project ends up ...