Software Engineering for Students A Programming Approach
Software Engineering for Students A Programming Approach Software Engineering for Students A Programming Approach
util Figure C.6 A package diagram Stack ArrayList Random C.4 Activity diagrams 415 An activity diagram can also be used to show a human activity, such as carrying out throwaway prototyping, Figure C.7. Actions are written in boxes with curved corners. The sequence of actions is shown by the arrows. A sequence starts with a special “blob” symbol. A sequence ends with a different symbol, as shown. Draw up an outline specification [User happy] Construct prototype Check with user Deliver the specification [User requires change] Figure C.7 Activity diagram showing throwaway prototyping Refine prototype
416 Appendix C ■ UML summary This diagram also uses the diamond-shaped branch symbol. Associated with each output from the branch is a condition (termed a guard). If the condition is true, the route is taken – just as in an if statement. Further reading •Two very clear and readable books on UML are: Martin Fowler, UML Distilled, Addison-Wesley. Perdita Stevens, and Rob Pooley, Using UML, Addison-Wesley.
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util<br />
Figure C.6 A package diagram<br />
Stack<br />
ArrayList<br />
Random<br />
C.4 Activity diagrams 415<br />
An activity diagram can also be used to show a human activity, such as carrying out<br />
throwaway prototyping, Figure C.7. Actions are written in boxes with curved corners.<br />
The sequence of actions is shown by the arrows. A sequence starts with a special “blob”<br />
symbol. A sequence ends with a different symbol, as shown.<br />
Draw up an outline<br />
specification<br />
[User happy]<br />
Construct<br />
prototype<br />
Check with<br />
user<br />
Deliver the<br />
specification<br />
[User requires change]<br />
Figure C.7 Activity diagram showing throwaway prototyping<br />
Refine<br />
prototype
Change language