Class diagrams, when used in conjunction with sequence diagrams, provide an extremely effective communication mechanism. You can use a class diagram to illustrate the relationships between the ...

The Unified Modeling Language (UML) is a de facto standard for modeling object-oriented systems. In UML there are five different types of relationships: association, aggregation, composition ...

The Jakarta Persistence API (JPA) is a Java specification that bridges the gap between relational databases and object-oriented programming. This two-part tutorial introduces JPA and explains how ...