Learn how to recognize and use the Gang of Four Strategy and Visitor patterns in Java code ...

The GoF Design Patterns published in 1998 qualifies as a classic still being taught in universities and recommended as best practice in the industry. In his deep dive session from Devoxx, Venkat ...

The Observable design pattern is found in many Java APIs and in reactive programming. Here's an introduction to the timeless Observable pattern in Java.

Twenty-three years ago, in his Design Principles and Design Patterns article, Robert "Uncle Bob" Martin boiled down the Liskov substitution principle to the idea that "derived classes should be ...