- 16.1 Applying UML: Common Class Diagram Notation
- 16.2 Definition: Design Class Diagram
- 16.3 Definition: Classifier
- 16.4 Ways to Show UML Attributes: Attribute Text and Association Lines
- 16.5 Note Symbols: Notes, Comments, Constraints, and Method Bodies
- 16.6 Operations and Methods
- 16.7 Keywords
- 16.8 Stereotypes, Profiles, and Tags
- 16.9 UML Properties and Property Strings
- 16.10 Generalization, Abstract Classes, Abstract Operations
- 16.11 Dependency
- 16.12 Interfaces
- 16.13 Composition Over Aggregation
- 16.14 Constraints
- 16.15 Qualified Association
- 16.16 Association Class
- 16.17 Singleton Classes
- 16.18 Template Classes and Interfaces
- 16.19 User-Defined Compartments
- 16.20 Active Class
- 16.21 Whats the Relationship Between Interaction and Class Diagrams?
16.20 Active Class
An active object runs on and controls its own thread of execution. Not surprisingly, the class of an active object is an active class. In the UML, it may be shown with double vertical lines on the left and right sides of the class box (Figure 16.20).
Figure 16.20 Active classes in the UML.