Introductory Beginning

Beginning Java Objects by Jacquie Barker

By Jacquie Barker

Between Java's many appealing positive aspects as a programming language, its object-oriented nature is vital to making robust, reusable code and functions which are effortless to take care of and expand. to exploit those services, you are going to needn't merely to grasp the syntax of the Java language, but in addition to realize a pragmatic realizing of what gadgets are all approximately, and extra importantly, easy methods to constitution a Java program from the floor as much as utilize items. With starting Java items: From thoughts to Code, you'll examine all 3!

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CHAPTER 2 ■ SOME JAVA BASICS • All functions are associated with objects and are known as methods—there can be no “free-floating” functions as there are in C/C++. • Even the main function used to launch an application (in Java it’s called the main method) no longer stands alone, but is instead bundled within a class, the reasons for which we’ll explore in depth in chapters to come. Because of this, Java lends itself particularly well to writing applications that uphold the OO paradigm. Yet, as I pointed out in the introduction to this book, merely using such an OO language does not guarantee that the applications you produce will be true to this paradigm!

Sun Microsystems is responsible for releasing new versions of Java for only a handful of platforms—in particular, newer “flavors” of Windows, Linux, and Sun Solaris (Unix). , Apple Macintosh and SGI IRIX [Unix]). I’ve encountered situations where a particular vendor releases a version of Java that has the same version number as a Sun release of Java, but where the features of that vendor’s version don’t quite measure up to the similarly numbered version from Sun. The bottom line is that it’s best to recompile Java source code for a given target platform before transferring the resultant bytecode to that platform, if you have that luxury.

Yet, we manage to make sense out of all of this information, typically without getting overwhelmed. Our brains naturally simplify the details of all that we observe so that these details are manageable through a process known as abstraction. In this chapter, you’ll learn • How abstraction serves to simplify our view of the world • How we organize our knowledge hierarchically to minimize the amount of information that we have to mentally juggle at any given time • The relevance of abstraction to software development • The inherent challenges that we face as software developers when attempting to model a real-word situation in software Simplification Through Abstraction Take a moment to look around the room in which you’re reading this book.

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