Objects
An object diagram illustrates specific instances of classes, as Figure C.4 shows. Following are notes on object diagrams.
Figure C.4. Depictions of objects indicate the objects' names and/or types. A sequence diagram shows a succession of method calls.
You can show an object by giving its name and type, separated by a colon. You may optionally show just the name, or just a colon and the type. In any case, underline the name and/or type of the object.
Use a line between objects to indicate that one object has a reference to another. You can use an open arrowhead to emphasize the direction of the reference.
You can show a sequence of objects ...
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