Notes, and exercises relating to the GoF book
Here each pattern is listed and a Java example is offered. The intent is for the example to be as correct as possible honouring the GoF, Java, and good design principles.
"GoF" Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides. (1994) Design Patterns: Elements of Reusable Object-Oriented Software. Addison-Wesley Professional