http://www.omnicus.net Cheap web hosting provider Tue, 28 Sep 2010 00:47:30 +0000 http://backend.userland.com/rss092 en Object-Oriented Design with UML and Java co.hire(e1, m3); co.hire(e2, m3); co.printEmployeeDetails(); } } The UML collaboration diagram of figure G.5 shows the configuration of objects and the message flows between them. The application, represented by the actor, sends the message ... http://www.omnicus.net/2009/07/04/object-oriented-design-with-uml-and-java-cohiree1-m3/ Appendix G: Object-Oriented Programming with Java public void hire(SalesEmployee sales, SalesManager man) { Iterator iter = theEmployees.iterator(); while(iter.hasNext() == true) { Employee emp = (Employee)iter.next(); if(emp instanceof SalesManager && emp == man) { SalesManager manager = (SalesManager)emp; manager.addSalesMember(sales); ... http://www.omnicus.net/2009/07/03/appendix-g-object-oriented-programming-with-java-public-void/ Object-Oriented Design with UML and Java Concrete subclass SalesManager and SalesEmployee must provide an implementation for printDetails. For class SalesManager we first print the details for the manager, then we cycle through the sales team members printing their name. Note also the method addSalesMember for ... http://www.omnicus.net/2009/07/03/object-oriented-design-with-uml-and-java-concrete-subclass/ Appendix G: Object-Oriented Programming with Java All staff have a name, job title and salary. A SalesEmployee has a sales target set against them. A SalesManager has a budget and is a manager for any number of the sales employees. -theEmployees 0..* ... http://www.omnicus.net/2009/07/02/appendix-g-object-oriented-programming-with-java-all-staff/ Object-Oriented Design with UML and Java The collection is, of course, a mix of Employee and Manager objects. When we select an item from the collection we cast it to some kind of Employee object. The polymorphic effect of the operation printDetails is determined dynamically at ... http://www.omnicus.net/2009/07/02/object-oriented-design-with-uml-and-java-the-collection/ Appendix G: Object-Oriented Programming with Java Employee Manager Company -theEmployees 0..* Figure G.3 Company/Employee class diagram The one-to-many relationship between a Company object and its Employee objects is realized by an ArrayList object as part of the Company class. The ... http://www.omnicus.net/2009/07/01/appendix-g-object-oriented-programming-with-java-employee-manager/ Object-Oriented Design with UML and Java Observe how the method printDetails is reintroduced in the subclass Manager. This is an example of method redefinition. The subclass is a more specialized version of the superclass with a budgetary responsibility, and requires a different presentation from this ... http://www.omnicus.net/2009/07/01/object-oriented-design-with-uml-and-java-observe-how-2/ Appendix G: Object-Oriented Programming with Java // ----- Attributes ----------------protected String theName; protected String theJobTitle; protected int theSalary; } The attributes of the class have protected visibility. Protected features behave as if they were private to other classes but ... http://www.omnicus.net/2009/06/30/appendix-g-object-oriented-programming-with-java/ 380 Object-Oriented Design with UML and Java superclass and hence an instance of the subclass can receive all the messages defined in the superclass. Further, this implies that where in our code an instance of a superclass is expected an instance of a subclass may be ... http://www.omnicus.net/2009/06/30/380-object-oriented-design-with-uml-and-java-superclass/ Appendix G Object-Oriented Programming with Java In this appendix we focus on the use and deployment of specialization. We illustrate Java s support for class specialization, substitution, method redefinition and the polymorphic effect. Further, we review abstract classes with deferred methods ... http://www.omnicus.net/2009/06/29/appendix-g-object-oriented-programming-with-java-in-this/