Developing Applications with Java(TM) and UML by Paul R. Reed

By Paul R. Reed

Constructing functions with Java™ and UML makes a speciality of the craft of making caliber Java software program. The booklet introduces the basics of the Unified Modeling Language (UML) and demonstrates the right way to use this regular object-oriented notation to construct extra strong Java functions that satisfy clients' standards and stand the attempt of time. The e-book good points the Rational Unified technique, utilizing a large-scale program to demonstrate the advance approach: how one can identify a legitimate venture plan, assemble software standards utilizing use situations, create a profitable Java layout with UML, and enforce Java code from the UML classification and series diagrams. This pattern software showcases the newest Java expertise frameworks, together with Java Server Pages™ (JSP), servlets, and the firm Java Beans™ (EJB) 2.0 server-side know-how. you'll methods to: Estimate with accuracy and self assurance tasks outfitted utilizing the use case procedure Map UML to Java-based deliverables comprehend and describe software specifications utilizing UML use instances Create a layout in line with UML type and series diagrams Use Rational Rose to create and music UML artifacts and generate skeletons for part code construct server-side Java performance utilizing JSP, servlets, and EJB 2.0 beans Produce code utilizing a number of innovations, together with JavaBeans, EJB consultation Beans, and EJB Entity Beans (using either Bean-Managed patience and Container-Managed patience) discover the advantages of deploying Java purposes on either open-source and advertisement program server items in response to the author's wide specialist adventure and the main complicated software program improvement equipment, constructing functions with Java™ and UML teaches you ways to exploit UML and the newest advancements in expertise to create really profitable, professional-quality Java functions. 0201702525B09042001

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For example, Order could implement the IPrice interface and perhaps a search interface called ISearch. However, a Java class may extend from only one other class. Java and Polymorphism Polymorphism is one of those $50 words that dazzles the uninformed and sounds really impressive. In fact, polymorphism is one of the most powerful features of any object-oriented language. Roget's II: The New Thesaurus cross-references the term polymorphism to the main entry of variety. That will do for starters.

GetOrderTotal() However, suppose the attribute orderTotal isn't kept as a local value of the Order class, but rather is derived via another mechanism (perhaps messaging to its OrderLine objects). getOrderLineTotal(); } return totalAmount; } This code cycles through the myOrderLines collection, which contains all the Orderline objects related to the Order object, sending the getOrderLineTotal() message to each of Order's OrderLine objects. getOrderTotal() Notice that the "client" code didn't change.

That class will still have a collection of Product types, but it will have four different ones instead of three, each of which will have its own unique implementation of the calcEOQ() operation. This is polymorphism at its best. At runtime, the class related to the object in question will be identified and the correct "variety" of the operation will be invoked. Polymorphism provides powerful extensibility features to the application by letting future unknown classes implement a predictable and well-conceived interface without affecting how other classes deal with that interface.

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