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IT151-1401B-01
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <body class="calibre"> <p class="block_"> </p> <p class="block_1">Intro to Java Programming I</p> <p class="block_1">IT151-1401B-01</p> <p class="block_1">Discussion Board 2</p> <p class="block_1">Orolobo Alabo George</p> <p class="block_1">February 26, 2014</p> <p class="block_2"> </p> <table class="table_"> <tbody class="calibre1"><tr class="calibre2"> <td class="td_"><p class="block_3">CAR</p></td> </tr> <tr class="calibre2"> <td class="td_1"><p class="block_4">Private String CarName</p><p class="block_4">Private String CarColour</p><p class="block_4">Private String ChasisNo</p><p class="block_5"> </p></td> </tr> <tr class="calibre2"> <td class="td_2"><p class="block_6">Public String Car ( ) </p><p class="block_6">Public String getCarName ( )</p><p class="block_6">Public void setCarName ( )</p><p class="block_6">Public String getCarColour ( )</p><p class="block_6">Public void setCarColour ( )</p><p class="block_6">Public int getChasisNo ( )</p><p class="block_6">Public void setChasisNo ( )</p><p class="block_6">Public String toString ( )</p><p class="block_7"> </p></td> </tr> </tbody></table> <p class="block_8"> </p> <p class="block_9">The class diagram is a static diagrammatic representation of the static view of an application. Class diagrams are used for visualizing, describing and documenting different aspects of system. Also, Class diagrams are used for the construction of executable code of the software application.</p> <p class="block_10"> </p> <p class="block_9">The class diagram gives a description of the attributes and operations of a class and also constraint imposed. In my diagram above for my Car Class, the attributes are the Name, Colour, and Chasis Number, while the operations include the getters and setters in the lower section of the diagram. Class diagrams like this are mainly used in the modelling of object oriented systems because class diagrams are the only UML diagrams that can be directly mapped with object oriented languages.</p> <p class="block_9">The class diagram shows a collection of classes, interfaces, associations, collaborations and constraints. It is also known as a <i class="calibre3">structural diagram</i>.</p> <p class="block_9">The purpose of the class diagram can be summarized as:</p> <p class="block_11">1. Analysis and design of the static view of an application.</p> <p class="block_11">2. Describe responsibilities of a system. </p> <p class="block_11">3. Base for component and deployment diagrams.</p> <p class="block_11">4. Forward and reverse engineering.</p> <p class="block_11">The following points are important to note while drawing a class diagram:</p> <ul class="list_"> <li class="block_12">The name of the class diagram should be meaningful to describe the aspect of the system.</li> <li class="block_12">Each element and their relationships should be identified in advance.</li> <li class="block_12">Responsibility (attributes and methods) of each class should be clearly identified.</li> <li class="block_12">For each class minimum number of properties should be specified. Because unnecessary properties will make the diagram complicated.</li> <li class="block_12">Use notes when ever required to describe some aspect of the diagram. Because at the end of the drawing it should be understandable to the developer/coder.</li> <li class="block_12">Finally, before making the final version, the diagram should be drawn on plain paper and rework as many times as possible to make it correct.</li> </ul> <p class="block_2"> </p> <p class="block_10"> </p> <p class="block_11">References:</p> <p class="block_13">UML Class Diagrams. Retrieved from: http://www.tutorialspoint.com/uml/uml_class_diagram.htm</p> <p class="block_13">Class Digrams- UML Diagram. Retrieved from: www.uml-diagrams.org/class-diagrams.html</p> <p class="block_14"> </p> <p class="block_14"> </p> <p class="block_14"> </p> </body></html> ">
