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Sams Teach Yourself J2EE™ in 21 Days by Peter Roxburgh, Andy Longshaw, Debbie Law, Dan Haywood, Martin Bond

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Sequence Diagrams

Class diagrams show how classes interact with each other, but they do not give you a feel for how instances of those classes will interact in a real situation. Instead, sequence diagrams model this type of behavior. These diagrams do this by showing objects and the messages that pass between these objects. In this appendix, you will learn the UML syntax for sequence diagrams by exploring two examples, the first of which is shown in Figure A.10.

Figure A.10. Sequence Diagram #1.

This first example shows most of the commonly used UML syntax for sequence diagrams. You place actors and boxes that represent objects or classes when ...

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