Introduction To Programming In Java PDF

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Introduction To Programming In Java

O UR GOAL IN THIS CHAPTER is to convince you that writing a program is easier than writing a piece of text, such as a paragraph or essay.

Writing prose is difficult we spend many years in school to learn how to do it. By contrast, just a few building blocks suffice to enable us to write programs that can help solve all sorts of fascinat ing.

but otherwise unapproachable, problems. In this chapter, we take you through these building blocks, get you started on programming in Java, and study a variety of interesting programs.

You will be able to express yourself (by writing programs) within just a few weeks. Like the ability to write prose, the ability to program is a life skill that you can continually refine well into the future.

In this book, you will learn the Java programming language. This task will be much easier for you than, for example, learning a foreign language.

Indeed, pro gramming languages are characterized by no more than a few dozen vocabulary words and rules of grammar.

Much of the material that we cover in this book could be expressed in the Cor C++ languages, or any of several other modern program ming languages.

But we describe everything specifically in lava so that you can get started creating and running programs right away.

On the one hand, we will focus on learning to program, as opposed to learning details about Java.

On the other hand, part of the challenge of programming is knowing which details are relevant in a given situation.

Java is widely used, so learning to program in this language will enable you to write programs on many computers (your own, for example).

Also, learning to program in Java will make it easy for you learn other languages, includ ing lower-level languages such as Cand specialized languages such as MATLAB.

1.1 Your First Program

IN THIS SECTION, OUR PLAN IS to lead you into the world of Java programming by tak ing you through the basic steps required to get a simple program running.

The Java system is a collection of applications, not unlike many of the other applications that you are accustomed to using (such as your word processor, email program, plication, you need to be sure that Java is properly installed on your computer.

It comes preloaded on many computers, or you can download it easily. You also need a text editor and a terminal application.

Your first task is to find the instructions for installing such a Java programming environment on your computer by visiting

Programs in this section We refer to this site as the book site.

It contains an extensive amount of supplementary information about the material in this book for your reference and use.

You will find it useful to have your browser open to this site while programming.

Programming in Java To introduce you to developing Java programs, we break the process down into three steps.

To program in Java, you need to:

• Create a program by typing it into a file named, say, Compile it by typing javac in a terminal window. Run (or execute) it by typing java MyCode in the terminal window.

In the first step, you start with a blank screen and end with a sequence of typed characters on the screen, just as when you write an email message or a paper.

Programmers use the term code to refer to program text and the term coding to refer to the act of creating and editing the code.

In the second step, you use a system application that compiles your program (translates it into a form more suitable for the computer) and puts the result in a file named MyCode.

class. In the third step, you transfer control of the computer from the system to your program (which returns control back to the system when finished).

Many systems have several different ways to create, compile, and execute programs. We choose the sequence described here because it is the simplest to describe and use for simple programs.

AuthorRobert & Kevin
Language English
No. of Pages735
PDF Size90.5 MB

Introduction To Programming In Java Book PDF Free Download

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