By Dan Clark
Beginning Object-Oriented Programming with VB 2005 is a entire source of right coding methods. writer Daniel Clark takes you thru all of the phases of a programming venture, together with research, modeling, and improvement, all utilizing object-oriented programming innovations and visible easy .NET.
Clark explores the constitution of sessions and their hierarchies, in addition to inheritance and interfaces. He additionally introduces the .NET Framework and the visible Studio built-in improvement setting, or IDE. A real-world case research walks you thru the layout of an answer. you could then remodel the layout right into a sensible VB .NET application.
The program contains a graphical person interface (GUI), a enterprise common sense type library, and integration with a back-end database. in the course of the e-book, you are going to discover the basics of software program layout, object-oriented programming, visible easy .NET 2.0, and the Unified Modeling Language (UML).
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Extra resources for Beginning Object-Oriented Programming with VB 2005: From Novice to Professional
For example, the RentalClerk object initiates a synchronous message with the RentalItem object, requesting information about whether a copy of the movie is in stock. The RentalItem object then sends a response back to the RentalClerk object, indicating a copy is in stock. Recursive Messages In OOP, it is not uncommon for an object to have an operation that invokes another object instance of itself. This is referred to as recursion. A message arrow that loops back toward the calling object represents recursion in the sequence diagram.
Objects are next to each other, and a dashed line extends from each of them downward. This dashed line represents the lifeline of the object. Rectangles on the lifeline represent activations of the object. The height of the rectangle represents the duration of the object’s activation. In OOP, objects interact by passing messages to each other. An arrow starting at the initiating object and ending at the receiving object depicts the interaction. A dashed arrow drawn back to the initiating object represents a return message.
In the next chapter, you will continue your study of object-oriented design. In particular, you will look at modeling how the objects in your applications will collaborate to carry out the functionality of the application. 29 30 CHAPTER 2 ■ DESIGNING OOP SOLUTIONS: IDENTIFYING THE CLASS STRUCTURE Activity Answers Activity 2-1 Answers 1. A, B, G. The actors are Member, Librarian, and Secretary. 2. A. Member, B. Secretary, C. Librarian, D. Librarian. The Request Item use case goes with Member, the Catalog Item use case goes with Secretary, the Lend Item use case goes with Librarian, and the Process Fine use case goes with Librarian.