UML Diagram Assignment Help, UML Diagram Homework Help
- 2. Describing a system at a high level of abstraction A model of the system Used for requirements and specifications Is it necessary to model software systems?
- 4. UML stands for “Unified Modeling Language” It is a industry-standard graphical language for specifying, visualizing, constructing, and documenting the artifacts of software systems The UML uses mostly graphical notations to express the OO analysis and design of software projects. Simplifies the complex process of software design
- 5. Use graphical notation to communicate more clearly than natural language (imprecise) and code(too detailed). Help acquire an overall view of a system. UML is not dependent on any one language or technology. UML moves us from fragmentation to standardization.
- 7. Use Case Diagram Class Diagram Sequence Diagram Collaboration Diagram State Diagram This is only a subset of diagrams … but are most widely used
- 8. Used for describing a set of user scenarios Mainly used for capturing user requirements Work like a contract between end user and software developers
- 10. Used for describing structure and behavior in the use cases Provide a conceptual model of the system in terms of entities and their relationships Used for requirement capture, end-user interaction Detailed class diagrams are used for developers
- 11. Each class is represented by a rectangle subdivided into three compartments Name Attributes Operations Modifiers are used to indicate visibility of attributes and operations. ‘+’ is used to denote Public visibility (everyone) ‘#’ is used to denote Protected visibility (friends and derived) ‘-’ is used to denote Private visibility (no one) By default, attributes are hidden and operations are visible.
- 12. Account_Name - Customer_Name - Balance +addFunds( ) +withDraw( ) +transfer( ) Name Attributes Operations
- 13. There are two kinds of Relationships Generalization (parent-child relationship) Association (student enrolls in course) Associations can be further classified as Aggregation Composition
- 14. Represent relationship between instances of classes Student enrolls in a course Courses have students Courses have exams Etc. Association has two ends Role names (e.g. enrolls) Multiplicity (e.g. One course can have many students) Navigability (unidirectional, bidirectional)
- 15. •CompositionComposition is really a strong form of aggregation •components have only one owner •components cannot exist independent of their owner •components live or die with their owner e.g. Each car has an engine that can not be shared with other cars. •Aggregations may form "part of" the aggregate, but may not be essential to it. They may also exist independent of the aggregate. e.g. Apples may exist independent of the bag.
- 16. Creation Create message Object life starts at that point Activation Symbolized by rectangular stripes Place on the lifeline where object is activated. Rectangle also denotes when object is deactivated. Deletion Placing an ‘X’ on lifeline Object’s life ends at that point Activation bar A B Create X Deletion Return Lifeline
- 17. State Diagrams show the sequences of states an object goes through during its life cycle in response to stimuli, together with its responses and actions; an abstraction of all possible behaviors. Unpaid Start End Paid Invoice created paying Invoice destroying
Editor's Notes
- #2: Introduce myself
- #3: 1. Describing the system at abstract level to comprehend its complexity 2. Necessary to manage complexity Good for quick understanding of the systems Less chances of conflicting views b/w end-user and system designers
- #4: Evolution of analysis and design techniques Transition from structured programming to object oriented programming
- #5: . What does UML stand for? . Industry standard . Graphical notation . Modeling tool … simplifies software design process
- #6: . More precise than natural language … less detailed than source code . Not dependent on any language . Standardized by various groups
- #7: History: - Rumbaugh – OMT – object modeling technique Jacobson – OOSE UML … unified approach since 1995 UML 1.5 current … UML 2.0 by the end of 2004