UML Diagrams

Class Diagrams

• Review class relationships:
  • Dependency
  • Aggregation, including multiplicities
  • Inheritance
• How class relationships are depicted in UML
• How UML class relationships translate (generally) into Java code
• How to get, install, and run Violet
• Operations in Violet:
  • Create class icon
  • Indicating class methods and attributes
  • Drawing class relationships
  • Customizing graph edges through the bentStyle property (HV, VH, etc.)
• Violet example showing various class relationships and bentStyles

Sequence Diagrams

• The difference between class and sequence diagrams:
  • Class diagrams: static, about classes
  • Sequence diagrams: dynamic, about objects
• The relationship of use cases and sequence diagrams
• How objects (as opposed to classes) are depicted in UML
• Aspects of a sequence diagram:
  • Objects
  • Lifelines
  • Activation bars
  • Call arrows and method names
• Operations in Violet:
  • Creating an object icon
  • Adding an activation bar
  • Making self-calls
  • Drawing and labeling a call arrow between objects
  • Modeling the construction of a new object with the «create» stereotype
• An example showing code and how a sequence diagram models it.