Download Beginning Java Objects: From Concepts To Code, 2nd Edition by Jacquie Barker PDF

By Jacquie Barker

Between Java's many appealing good points as a programming language, its object-oriented nature is vital to making strong, reusable code and purposes which are effortless to take care of and expand. to use those functions, you are going to needn't in basic terms to grasp the syntax of the Java language, but additionally to achieve a pragmatic realizing of what gadgets are all approximately, and extra importantly, how you can constitution a Java program from the floor as much as utilize items. With starting Java gadgets: From innovations to Code, you'll study all 3!

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Compare a road map with a topographical map, a climatological map, and a population density map of the same region: each abstracts out different features of the real world—namely, those relevant to the intended user of the map in question. As another example, consider a landscape. An artist may look at the landscape from the perspective of colors, textures, and shapes as a prospective subject for a painting. A homebuilder may look at the same landscape from the perspective of where the best building site may be on the property, assessing how many trees will need to be cleared to make way for a construction project.

Using the modeling techniques presented in these chapters, we’ll develop an object model “blueprint” for a Student Registration System (SRS), the requirements specification for which is presented at the end of this introduction. Part 3: Translating an Object Blueprint into Java Code In Part 3 of the book—in Chapters 13 through 17—I illustrate how to render the SRS object model that we develop in Part 2 into a fully functioning Java application, complete with a GUI and a way to persist data from one user logon to the next.

For example, a diagram of a generic cell in the human body, such as the one in Figure 1-1, might include only a few features of the structures that are found in an actual cell. Figure 1-1. A generic abstraction of a cell This overly simplified diagram doesn’t look like a real nerve cell, or a real muscle cell, or a real blood cell; and yet, it can still be used in an educational setting to describe certain aspects of the structure and function of all of these cell types—namely, those features that the various cell types have in common.

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