UML for Java (TM) Programmers by Robert C. Martin

By Robert C. Martin

Rather than surveying the full unified modeling language (UML), Martin makes a speciality of the diagrams he has discovered to be most beneficial for drawing photos of software-class, item, series, and nation diagrams-and examines the peculiarities of utilizing UML to layout Java courses. the ultimate bankruptcy describes a SMC distant carrier application in textual content, UML, and code.

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By Robert C. Martin

Rather than surveying the full unified modeling language (UML), Martin makes a speciality of the diagrams he has discovered to be most beneficial for drawing photos of software-class, item, series, and nation diagrams-and examines the peculiarities of utilizing UML to layout Java courses. the ultimate bankruptcy describes a SMC distant carrier application in textual content, UML, and code.

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I once consulted for a team that had decided to create sequence diagram for every method of evey class. No, no, no, no, no! Don’t do this, it’s a terrible waste of time. Use sequence diagrams when you have an immediate need to describe to someone how a group of objects collaborate, or when you want to visualize that collaboration for yourself. Use them as a tool that you occasionally use to hone your analytical skills, rather than as necessary documentation. The Basics I first learned to draw sequence diagrams in 1978.

F(); } } Figure 3-20 vive the member function that creates it. Thus, it is not held by any instance variable nor passed around the system in any way. The «parameter» stereotype shows that the source class gains access to the target instance though the parameter of one of its member functions. Again, the implication is that the source forgets all about this object once the member function returns. The target is not saved in an instance variable. The «delegates» stereotype is not a standard part of UML, it is one of my own.

Perhaps the code is good enough to stand on its own. When code can stand on its own, then diagrams are redundant and wasteful. sendPayment(pay - deductions); } } } } Can code really be used to describe part of a system? In fact, this should be a goal of the developers and designers. The team should strive to create code that is expressive and readable. The more the code can describe itself, the fewer diagrams you will need, and the better of the whole project will be. Secondly, if you feel a sequence diagram is necessary, ask yourself if there is a way to split it up into a small group of scenarios.

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