COMP 310 Fall 2017	Lec04: UML Diagrams

Quick UML primer:

• Boxes
  • Classes
    • Name, fields and methods
      • Concrete (regular type) vs abstract (italic type)
      • Chevrons sometimes used to denote interfaces.
      • Sometimes the "role" in which the class plays in the design will be also be noted.
    • Accessibility:  public (+), private (-), package (nothing)
  • Comments/Notes  (dog-eared)
• Lines:
  • Solid arrowheads -- generalization
    • solid line: inheritance
    • dotted line:implementation
  • Open arrowheads
    • solid line:  association ("has-a")  -- composition (with solid diamond end)  or aggregation (with open diamond end) or unspecified (no diamond end).   Java is always aggregation.
    • dotted line:   dependency ("instantiates", "uses", etc)

Use UML Lab to help you concentrate on the design of your system, its structure and behaviors, rather than on the Java syntax.

Using UML Lab

We will be discussing issues concerning composite shapes in class and continuing on to the next lecture.

© 2017 by Stephen Wong