Appendix C. UML at a Glance- Use a dashed arrow between classes to show a dependency that does not use an object
reference. For example, the Customer class uses a static method from the
LikeMyStuff recommendation engine.
Interfaces.....................................................................................................................................................
Figure C.3 shows the basic features for illustrating interfaces. Following are notes on
interfaces.
Figure C.3. You can indicate an inter-face with either an «interface» stereotype or
a lollipop.- You can draw an interface by placing the text «interface» and the name of
the interface in a rectangle, as Figure C.3 shows. You can use a dashed line and a
closed, hollow arrowhead to show that a class implements the interface. - You can also show that a class implements an interface by showing a line and circle,
or "lollipop," and the name of the interface. - Interfaces and their methods are always abstract in Java. Oddly enough, interfaces and
their methods do not appear in italics, unlike abstract classes and abstract methods in
classes.
Objects.........................................................................................................................................................
An object diagram illustrates specific instances of classes, as Figure C.4 shows. Following are
notes on object diagrams.