30,99 €
Mehr erfahren.
- Herausgeber: John Wiley & Sons
- Kategorie: Wissenschaft und neue Technologien
- Sprache: Englisch
A comprehensive Java guide, with samples, exercises, case studies, and step-by-step instruction
Beginning Java Programming: The Object Oriented Approach is a straightforward resource for getting started with one of the world's most enduringly popular programming languages. Based on classes taught by the authors, the book starts with the basics and gradually builds into more advanced concepts. The approach utilizes an integrated development environment that allows readers to immediately apply what they learn, and includes step-by-step instruction with plenty of sample programs. Each chapter contains exercises based on real-world business and educational scenarios, and the final chapter uses case studies to combine several concepts and put readers' new skills to the test.
Beginning Java Programming: The Object Oriented Approach provides both the information and the tools beginners need to develop Java skills, from the general concepts of object-oriented programming. Learn to:
- Understand the Java language and object-oriented concept implementation
- Use Java to access and manipulate external data
- Make applications accessible to users with GUIs
- Streamline workflow with object-oriented patterns
The book is geared for those who want to use Java in an applied environment while learning at the same time. Useful as either a course text or a stand-alone self-study program, Beginning Java Programming is a thorough, comprehensive guide.
Sie lesen das E-Book in den Legimi-Apps auf:
Seitenzahl: 915
Veröffentlichungsjahr: 2015
Ähnliche
CONTENTS
INTRODUCTION
WHO THIS BOOK IS FOR
TOPICS COVERED IN THIS BOOK
TOPICS NOT COVERED IN THIS BOOK
CONVENTIONS
SOURCE CODE
ERRATA
P2P.WROX.COM
HOW TO READ THIS BOOK
GET IN TOUCH
1 A GENERAL INTRODUCTION TO PROGRAMMING
THE PROGRAMMING PROCESS
OBJECT-ORIENTED PROGRAMMING: A SNEAK PREVIEW
PROGRAMMING ERRORS
PRINCIPLES OF SOFTWARE TESTING
SOFTWARE MAINTENANCE
PRINCIPLES OF STRUCTURED PROGRAMMING
2 GETTING TO KNOW JAVA
A SHORT JAVA HISTORY
FEATURES OF JAVA
LOOKING UNDER THE HOOD
JAVA LANGUAGE STRUCTURE
JAVA DATA TYPES
SUMMARY
3 SETTING UP YOUR DEVELOPMENT ENVIRONMENT
INTEGRATED DEVELOPMENT ENVIRONMENTS
INSTALLING ECLIPSE ON YOUR COMPUTER
4 MOVING TOWARD OBJECT-ORIENTED PROGRAMMING
BASIC CONCEPTS OF OBJECT-ORIENTED PROGRAMMING
CLASSES AND OBJECTS IN JAVA
STORING DATA: VARIABLES
DEFINING BEHAVIOR: METHODS
JAVA SE BUILT-IN CLASSES
5 CONTROLLING THE FLOW OF YOUR PROGRAM
COMPARISONS USING OPERATORS AND METHODS
UNDERSTANDING LANGUAGE CONTROL
6 HANDLING EXCEPTIONS AND DEBUGGING
RECOGNIZING ERROR TYPES
EXCEPTIONS
DEBUGGING YOUR APPLICATIONS
TESTING YOUR APPLICATIONS
SUMMARY
7 DELVING FURTHER INTO OBJECT-ORIENTED CONCEPTS
ANNOTATIONS
OVERLOADING METHODS
THE THIS KEYWORD
INFORMATION HIDING
CLASS INHERITANCE
PACKAGES
INTERFACES
GARBAGE COLLECTION
8 HANDLING INPUT AND OUTPUT
GENERAL INPUT AND OUTPUT
INPUT AND OUTPUT IN JAVA
STREAMS
SCANNERS
INPUT AND OUTPUT FROM THE COMMAND-LINE
INPUT AND OUTPUT FROM FILES
CONCLUSION
9 WORKING WITH DATABASES IN JAVA
COVERING THE BASICS OF RELATIONAL DATABASES
ACCESSING RELATIONAL DATABASES FROM JAVA
ENSURING OBJECT PERSISTENCE
COMPARING JAVA DATABASE ACCESS TECHNOLOGIES
WHAT’S AHEAD
10 ACCESSING WEB SOURCES
A BRIEF INTRODUCTION TO NETWORKING
WEB SERVICES
ACCESSING WEB SERVICES AND SOURCES WITH JAVA
CREATING YOUR OWN WEB SERVICES WITH JAVA
11 DESIGNING GRAPHICAL INTERFACES
COVERING THE BASICS OF GUIs IN JAVA
COMPARING LAYOUT MANAGERS
UNDERSTANDING EVENTS
CLOSING TOPICS
12 USING OBJECT-ORIENTED PATTERNS
INTRODUCTION TO PATTERNS
OBJECT-ORIENTED PATTERNS
HELPFUL LIBRARIES
TITLE PAGE
COPYRIGHT
DEDICATION
ABOUT THE AUTHORS
CREDITS
ACKNOWLEDGMENTS
ADVERT
EULA
List of Tables
Chapter 1
Table 1.1
Chapter 2
Table 2.1
Table 2.2
Table 2.3
Table 2.4
Table 2.5
Table 2.6
Table 2.7
Table 2.8
Table 2.9
Table 2.10
Table 2.11
Table 2.12
Table 2.13
Chapter 5
Table 5.1
Table 5.2
Table 5.3
Table 5.4
Chapter 9
Table 9.1
Table 9.2
Table 9.3
Table 9.4
Table 9.5
Table 9.6
List of Illustrations
Chapter 1
Figure 1.1
Figure 1.2
Figure 1.3
Figure 1.4
Chapter 2
Figure 2.1
Figure 2.2
Figure 2.3
Figure 2.4
Figure 2.5
Figure 2.6
Figure 2.7
Figure 2.8
Figure 2.9
Figure 2.10
Figure 2.11
Figure 2.12
Chapter 3
Figure 3.1
Figure 3.2
Figure 3.3
Figure 3.4
Figure 3.5
Figure 3.6
Figure 3.7
Figure 3.8
Figure 3.9
Figure 3.10
Figure 3.11
Figure 3.12
Figure 3.13
Figure 3.14
Figure 3.15
Figure 3.16
Figure 3.17
Figure 3.18
Figure 3.19
Figure 3.20
Chapter 4
Figure 4.1
Figure 4.2
Figure 4.3
Figure 4.4
Figure 4.5
Figure 4.6
Figure 4.7
Chapter 6
Figure 6.1
Figure 6.2
Figure 6.3
Figure 6.4
Figure 6.5
Figure 6.6
Figure 6.7
Figure 6.8
Figure 6.9
Figure 6.10
Figure 6.11
Figure 6.12
Figure 6.13
Figure 6.14
Figure 6.15
Figure 6.16
Figure 6.17
Figure 6.18
Chapter 7
Figure 7.1
Figure 7.2
Figure 7.3
Figure 7.4
Figure 7.5
Figure 7.6
Chapter 8
Figure 8.1
Figure 8.2
Figure 8.3
Figure 8.4
Figure 8.5
Figure 8.6
Figure 8.7
Figure 8.8
Figure 8.9
Figure 8.10
Figure 8.11
Figure 8.12
Chapter 9
Figure 9.1
Figure 9.2
Figure 9.3
Figure 9.4
Figure 9.5
Figure 9.6
Figure 9.7
Figure 9.8
Figure 9.9
Figure 9.10
Figure 9.11
Figure 9.12
Figure 9.13
Figure 9.14
Figure 9.15
Figure 9.16
Figure 9.17
Figure 9.18
Figure 9.19
Figure 9.20
Figure 9.21
Figure 9.22
Figure 9.23
Chapter 10
Figure 10.1
Figure 10.2
Figure 10.3
Figure 10.4
Figure 10.5
Figure 10.6
Figure 10.7
Figure 10.8
Figure 10.9
Figure 10.10
Figure 10.11
Figure 10.12
Figure 10.13
Figure 10.14
Figure 10.15
Figure 10.16
Figure 10.17
Figure 10.18
Figure 10.19
Figure 10.20
Figure 10.21
Figure 10.22
Figure 10.23
Figure 10.24
Figure 10.25
Figure 10.26
Figure 10.27
Figure 10.28
Figure 10.29
Figure 10.30
Figure 10.31
Figure 10.32
Chapter 11
Figure 11.1
Figure 11.2
Figure 11.3
Figure 11.4
Figure 11.5
Figure 11.6
Figure 11.7
Figure 11.8
Figure 11.9
Figure 11.10
Figure 11.11
Figure 11.12
Figure 11.13
Figure 11.14
Figure 11.15
Figure 11.16
Figure 11.17
Figure 11.18
Figure 11.19
Figure 11.20
Figure 11.21
Figure 11.22
Figure 11.23
Figure 11.24
Figure 11.25
Figure 11.26
Figure 11.27
Figure 11.28
Figure 11.29
Figure 11.30
Figure 11.31
Figure 11.32
Figure 11.33
Figure 11.34
Figure 11.35
Chapter 12
Figure 12.1
Figure 12.2
Figure 12.3
Figure 12.4
Figure 12.5
Figure 12.6
Guide
Cover
Table of Contents
Chapter
Pages
xxii
xxiii
xiv
xxv
xxvi
xxvii
xxviii
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
114
115
116
117
118
119
120
121
122
123
124
125
126
127
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
203
204
205
206
207
208
209
210
211
212
214
215
216
217
219
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
251
252
253
254
255
256
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
307
308
309
310
311
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
337
338
339
340
341
342
343
344
345
347
348
349
350
351
352
353
354
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
390
392
393
394
395
398
399
400
401
402
403
404
405
406
407
408
409
410
412
413
414
415
417
419
420
421
422
423
424
425
428
430
433
434
435
436
440
441
442
443
444
445
448
449
450
451
452
453
454
456
457
458
460
461
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
502
503
504
505
506
507
508
510
511
512
513
514
515
516
517
518
519
520
521
522
524
525
526
527
528
530
531
532
533
537
538
539
540
541
543
544
545
546
547
548
550
551
552
553
554
555
557
559
560
561
562
563
564
565
566
567
569
570
571
572
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
592
593
594
595
596
597
598
599
600
601
602
603
604
606
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
INTRODUCTION
Congratulations! By picking up this book you have made the first step in your voyage toward learning Java. Java is a programming language with a long history, starting with its inception in 1991, when it was still named “Oak,” through the first public release (Java 1.0) in 1995 and the newly released Java 8. Its “write once, run anywhere” approach, together with robust language features and numerous libraries led to a spectacular adoption rate. Java is one of the most popular languages in use today, and has been especially successful in enterprise and business environments.
Note, however, that Java is not without its criticism (no programming language is). You might have picked upon the often-repeated criticism that Java is verbose, unsecure, suffering from a slow release cycle, and that it is fading in popularity compared to the interest in new, more exciting languages (Ruby, Erlang, and Haskell, to name a few) by the computer science and programmer communities. The reality, however, tells a different story. Java remains widely taught in schools and universities and is regarded as the language of choice in many organizations. The introduction of Java 7 in 2011 made many tasks simpler, and the availability of many seasoned and stable libraries, tools, and feature-complete IDEs is unmatched by the ecosystem found around other languages. In 2014, Java 8 introduced lambda expressions to streamline code and a reengineered date and time interface that simplifies and improves the internationalization of applications. Java’s strong architectural foundations make the language ideally suited for both newcomers and experienced programmers who want to expand their knowledge of Object-Oriented Programming.
Before reaching the end of this book, you will agree that being proficient in Java is a strong skill to possess indeed. We aim to get you started and up to speed as quickly as possible, without making sacrifices in terms of depth and breadth of topics. The goal is not to guide you in simply adding yet another (or first) language to your repertoire, but also to familiarize you with Java’s underlying approach toward robust and structured Object-Oriented Programming. As you will see, Java’s “verbosity” makes it ideally suited to teach programming best practices in an explicit manner. Providing step-by-step explanations together with many examples—inspired by real-life environments rather than toy exercises—will help you quickly appreciate Java’s design and usefulness, and learn that programming in Java can even be great fun!
WHO THIS BOOK IS FOR
Java is a great language to learn for both new and experienced programmers. As such, this book is geared towards a broad audience, including practitioners, analysts, programmers, and students wanting to apply Java in a pragmatic context. It doesn’t matter whether you are new to programming and have chosen Java as a place to start or whether you come in from another programming language; Java is a great choice. Many books exist on the topic of Java (just look at the shelf where you found this book!), but we feel that existing offerings reuse the same approach to demonstrate concepts. Therefore, you will not find the archetypical (and honestly, completely useless) “Hello World” example in this book. Instead, we delve into concrete, thought-out examples that illustrate how Java can be useful and used in real life. Whether you are an analyst struggling with spreadsheet formulas to perform a somewhat advanced calculation (there has to be a smarter way, right?), a student wondering how your future employer is using Java, or a hobbyist programmer trying to keep track of stock quotes or a book database, this book aims to familiarize you with all the necessary concepts.
TOPICS COVERED IN THIS BOOK
The topics discussed in this book can, broadly speaking, be outlined in the following three categories. First is a general introduction to programming and Java. The first chapters briefly discuss programming in general, before moving on to a high-level description of Java’s history and language features. We also make sure to set up everything you need to get started with Java.
The second part deals with Object-Oriented Programming in Java. The goal is to help readers acquire a strong knowledge of how Object-Oriented Programming works and how Java programs are structured.
The third part is more focused and practical, and shows how you can leverage Java to talk to data sources (such as files, databases, and even web services) and how you can create a graphical user interface around your program logic.
Note that we have not structured the book around the aforementioned three parts. Instead of splitting the book into “theoretical” and “practical” parts, we chose to introduce new concepts step-by-step as they are needed so that you can quickly move on to examples and exercises. The best way to learn is by doing, and this saying particularly holds true when learning to program.
In Chapter 1, we provide a brief general introduction to programming geared toward newcomers and novice programmers. In Chapter 2, we start introducing Java by providing an overview of the language’s history, the different technological components that make up the language, the general language structure, and data types. At that point, you will know enough to get started, so that in Chapter 3, we will guide you toward setting up your development environment and trying out some basic examples and exercises. In Chapter 4, we introduce Object-Oriented Programming basics; flow-control statements are covered in Chapter 5. At that point, you will be able to create simple but functional programs. Chapter 6 explains how to catch errors and debug your programs, which will come in handy as you start using resources and coding more advanced programs. At this point, you will have all the necessary components to start looking at some more advanced Object-Oriented Programming concepts in Chapter 7. After this, you’ll be ready to tackle more complex interactions with files, external sources, and users. In Chapter 8 you will look at dealing with file-based input and output, including how to load files, perform basic operations, and save the results back to disk. Chapters 9 and 10 build on this by explaining how to interact with databases and web sources. At this point, you will be itching to move away from command-line based applications, and Chapter 11 explains in-depth how to build graphical user interfaces. Chapter 12 concludes the theory by providing an overview of some common architectural patterns (best practices, if you will) used by seasoned Java developers.
By the end of this book, you will have gained a strong knowledge of Java’s internals, you will know what is meant by Object-Oriented Programming, know how to debug and deal with errors in your programs, know how to handle file-based input and output, talk to databases, talk to web services, make a full-fledged graphical application, and be familiar with some common and well-known programming “patterns,” which are best practices to structure and organize a program’s architectural setup.
TOPICS NOT COVERED IN THIS BOOK
This book is not a reference manual. The goal is to get readers acquainted with the basics of Java and Object-Oriented Programming to use within practical applications, not to provide a full overview of Java’s API. As such, given the scope of this book, there are some concepts that are not discussed in detail. However, we have taken care to avoid elements you can live without at this point in your Java career.
Working with generics in Java, for example, is not discussed explicitly, but instead explained briefly where needed (when we talk about collections in Java, such as lists or sets, for example). Working with generic classes can be daunting for novice Java programmers, and the Object-Oriented Programming concepts discussed suffice to cover the multitude of use cases. That said, familiarizing yourself with generic types after going through this book should not prove difficult.
Other topics that are not discussed in-depth include networking in Java (socket programming), multi-threaded and concurrent programming, reflection, and the lambda expressions introduced with Java 8. Networking aspects, however, are dealt with from a “higher-level” view. We discuss how to interact with web services, which provides a great starting point for practitioners to load data coming from the web. Concurrent, multi-threaded programming is a beneficial practice when performance and speed becomes an issue in applications, but for most use cases in a practical context, Java performs just fine without having to deal with multi-threading. Additionally, programming in a concurrent fashion introduces some particular challenges and “gotchas” that are unfit for beginning Java programmers to deal with. Reflection is a part of the Java API that allows programmers to examine and “reflect” on Java programs while they are running and perform changes to programs while they are being executed. While very helpful in some cases, it also is out of scope for a beginner’s book on Java. Finally, the recently released Java 8 introduces some new concepts, most notably lambda expressions. Java 7 also provides functionality to work with so-called “anonymous classes,” which are ad hoc implementations of a base class without a specific name or definition. Other than the fact that these classes can appear somewhat verbose, they are perfectly fine to use instead of lambda expressions (which provide the same functionality in a more concise manner) and are still widely used. We do, however, provide short notes on developments within Java 8 whenever appropriate.
Finally, Java is composed of a certain number of “technologies” (also called platform components). The “standard” Java is denoted as “Standard Edition” (SE), and is the one we tackle here. An Enterprise Edition (EE) also exists, as well as a number of extensions to develop embedded and mobile applications (Embedded Java and Java ME), applications for smart TVs (Java TV), and graphic-intensive applications (Java FX and Java 2D). We do not discuss these extensions in this book, as they have no place in a beginner’s book on Java. Readers wanting to apply Java in these specific areas should, however, be ready to move on to these more focused topics after reading this book.
CONVENTIONS
This book applies a number of styles and layout conventions to differentiate between the different types of information.
TRY IT OUTS What Are They?
This book comes with many code examples and exercises that introduce and explain new concepts step-by-step. These are called “Try It Outs” and can be executed directly while reading the chapters or revisited at a later time. Each Try It Out is followed by a How It Works, which is designed to help you understand exactly what’s happening in the Try It Out exercise.
In addition to providing extensive examples in the form of Try It Outs, you will also encounter frequent tips, hints, advice, and background information, which are formatted like this:
NOTE Tips, hints, advice, and background information are formatted like this. Reading these segments can help to make concepts clearer. You may also notice a Warning or Common Mistakes heading on these boxes to bring your attention to particular things you should avoid.
Discussions that extend beyond a short tip or note will look a little bit different.
SIDEBAR
We use this format to explain concepts that require more than a simple note. The details are not necessary to the understanding of the book but offer a more complete discussion on a particular topic.
Finally, program code within this book is formatted in two ways. The first way is as code type: (/* Like this comment */). Variables (like iAmAVariable) appear in italic code type.
Larger code blocks look like the following:
public class NoHelloWorld { public static void main(String[] args) { System.out.println("This is not an Hello World program..."); } }
NOTE Eclipse is the Integrated Development Environment (IDE) we will be using throughout this book. Don’t worry what this means for now. Everything you need to set up in order to follow along is explained in Chapter 3.
All these styles are designed to make sure it’s easy for you to know what you’re looking at while you read.
SOURCE CODE
As you work through the examples in this book, you may choose either to type in all the code manually or to use the source-code files that accompany the book. All of the source code used in this book is available for download at www.wrox.com. Once at the site, simply locate the book’s title (either by using the Search box or by using one of the title lists) and click the Download Code link on the book’s detail page to obtain all the source code for the book.
NOTE Because many books have similar titles, you may find it easiest to search by ISBN; this book’s ISBN is 978-1-118-73949-5.
Once you download the code, just decompress it with your favorite compression tool. Alternately, you can go to the main Wrox code download page at www.wrox.com/dynamic/books/download.aspx to see the code available for this book and all other Wrox books.
ERRATA
We make every effort to ensure that there are no errors in the text or in the code. However, no one is perfect, and mistakes do occur. If you find an error in one of our books, like a spelling mistake or faulty piece of code, we would be very grateful for your feedback. By sending in errata, you may save another reader hours of frustration, and at the same time you will be helping us provide even higher-quality information.
To find the errata page for this book, go to www.wrox.com and locate the title using the Search box or one of the title lists. Then, on the book details page, click the Book Errata link. On this page you can view all errata that have been submitted for this book and posted by Wrox editors. A complete book list, including links to each book’s errata, is also available at www.wrox.com/misc-pages/booklist.shtml.
If you don’t spot “your” error on the Book Errata page, go to www.wrox.com/contact/techsupport.shtml and complete the form there to send us the error you have found. We’ll check the information and, if appropriate, post a message to the book’s errata page and fix the problem in subsequent editions of the book.
P2P.WROX.COM
For author and peer discussion, join the P2P forums at p2p.wrox.com. The forums are a web-based system on which you can post messages relating to Wrox books and related technologies and interact with other readers and technology users. The forums offer a subscription feature to e-mail you topics of interest of your choosing when new posts are made to the forums. Wrox authors, editors, other industry experts, and your fellow readers are present on these forums.
At http://p2p.wrox.com you will find a number of different forums that will help you not only as you read this book, but also as you develop your own applications. To join the forums, just follow these steps:
Go to p2p.wrox.com and click the Register link.
Read the terms of use and click Agree.
Complete the required information to join as well as any optional information you wish to provide, and click Submit.
You will receive an e-mail with information describing how to verify your account and complete the joining process.
NOTE You can read messages in the forums without joining P2P, but in order to post your own messages, you must join.
Once you join, you can post new messages and respond to messages other users post. You can read messages at any time on the Web. If you would like to have new messages from a particular forum e-mailed to you, click the Subscribe to this Forum icon by the forum name in the forum listing.
For more information about how to use the Wrox P2P, be sure to read the P2P FAQs for answers to questions about how the forum software works, as well as many common questions specific to P2P and Wrox books. To read the FAQs, click the FAQ link on any P2P page.
HOW TO READ THIS BOOK
This book is mostly designed as a hands-on tutorial and tries to keep you practicing and trying out new concepts as quickly and often as possible. As mentioned before, you will find Try It Outs throughout this book where you will find step-by-step instructions for working with Java.
You will notice that we alternate between chapters that are more theoretical in nature (such as what Object-Oriented Programming is) and chapters that are more practical (such as how to read in a file and do something with it). As such, the preferred way to go through this book when you’re reading it the first time is to work your way from beginning to end. Think of this book as a tour through Java. We do not visit every nook and cranny—you don’t need to examine each and every small detail—but you do want to get the big picture, enabling you to get proficient with Java as quickly as possible without taking dangerous shortcuts by explaining concepts in a haphazardly manner. Whenever you encounter a practical chapter that seems less useful, however, you are free to skip it and return to it later. That said, we have clearly separated the chapters to match a specific set of topics, so readers revisiting this book will have no trouble immediately navigating to the right spot.
Given the nature of programming, it is unavoidable that you will run across some examples in earlier chapters that includes a concept that will be explained in a later section. We always indicate these forward references in a clear manner and tell you “not to worry about this until Chapter X.” Trust us on this; these elements will be covered later.
As you proceed, remember the best way to learn is to try out things on your own, extend projects, and create new ones. The Try It Out exercises provide examples throughout the text for you to start programming with a lot of guidance. As your knowledge and confidence build, try creating your own simple programs to complete tasks that are interesting for you. This way, you will put the concepts you’ve learned to use and start to see how Java can work for you.
GET IN TOUCH
We have tried to make this book as complete, accurate, and enjoyable as possible. Of course, what really matters is what you, as the reader, think of it. Please let us know your views by getting in touch. The authors welcome all feedback and comments.
Bart Baesens
Aimée Backiel
Seppe vanden Broucke
January, 2015
1A General Introduction to Programming
WHAT YOU WILL LEARN IN THIS CHAPTER:
The key steps in a programming process
The different types of programming errors
The key principles of software testing
The different types of software maintenance
The key principles of structured programming
WROX.COM CODE DOWNLOADS FOR THIS CHAPTER
The wrox.com code downloads for this chapter are found at www.wrox.com/go/beginningjavaprogramming on the Download Code tab. The code is in the Chapter 1 download and individually named according to the names throughout the chapter.
Developing good and correct software is a very important challenge in today’s business environment. Given the ubiquity and pervasiveness of software programs into our daily lives, the impact of faulty software is now bigger than ever. Software errors have caused flight crashes, rocket launch errors, and power blackouts, to name a few examples. Hence, it is important to design high-quality, error-free software programs. This chapter covers the fundamental concepts of programming. First, it elaborates on the programming process. The next section provides a sneak preview of object-oriented programming. This is followed by a short discussion on programming errors. The basic principles of software testing and software maintenance are also discussed. The chapter concludes by giving some recommendations relating to structured programming. You will revisit many of these ideas in future chapters, with a more hands-on approach.
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
Lesen Sie weiter in der vollständigen Ausgabe!
