I’ve received quite a bit of feedback on my “Singletons Rule” Q&A. Unfortunately, much of the confusion seems to stem from this sentence: The difference between using a singleton over a class with ...

Object-oriented systems are usually partitioned into layers of related responsibilities and only dependencies in one direction are allowed, from higher layers (more specific, less reusable) to lower ...

Object-Oriented Analysis and Design is a course that presents an introduction to the design and construction of software systems using techniques that view a system as a set of objects that work ...

When a Java EE application needs to implement type-specific behavior for domain objects, a procedural, service-oriented approach leads to unnecessary code and hard-to-maintain logic. Learn about Java ...