12+ Class Diagram Abstract Class. Shape is an abstract class. Interfaces are often declared through abstract classes.
Class diagrams are a neat way of visualizing the classes in your system before you actually start coding them up. A class that is declared using abstract keyword is known as abstract class. An abstract class is a class that is declared abstract—it may or may not include abstract methods.
A class diagram may also have notes attached to classes or relationships.
12+ Class Diagram Abstract Class. Notes are shown in grey. Interfaces are often declared through abstract classes. They create hierarchical relationships and associations between the uml element relationship is an abstract class. Generally, a class diagram highlights the object orientation of a system is the.