Chapter 1 Introduction to Computers, (Cheapest web hosting) the Internet and
Chapter 1 Introduction to Computers, the Internet and the Web 41 Appendix C Operator Precedence Chart lists each of the Java operators and indicates their relative precedence and associativity. We list each operator on a separate line and include the full name of the operator. Appendix D ASCII Character Set lists the characters of the ASCII (American Standard Code for Information Interchange) character set and indicates the character code value for each. Java uses the Unicode character set with 16-bit characters for representing all of the characters in the world s commercially significant languages. Unicode includes ASCII as a subset. Currently, most English-speaking countries are using ASCII and just beginning to experiment with Unicode. Appendix E Number Systems discusses the binary (base 2), decimal (base 10), octal (base 
and hexadecimal (base 16) number systems. This material is valuable for introductory courses in computer science and computer engineering. The appendix is presented with the same pedagogic learning aids as the chapters of the book. A nice feature of the appendix is its 31 exercises, 19 of which are self-review exercises with answers. Appendix F Creating javadoc Documentation introduces the javadoc documentation-generation tool. Sun Microsystems uses javadoc to document the Java APIs. The example in this appendix takes the reader through the javadoc documentation process. First, we introduce the comment style and tags that javadoc recognizes and uses to create documentation. Next, we discuss the commands and options used to run the utility. Finally, we examine the source files javadoc uses and the HTML files javadoc creates. 1.18 (Optional) A Tour of the Case Study on Object-Oriented Design with the UML In this and the next section, we tour the two optional major features of the book the optional case study of object-oriented design with the UML and our introduction to design patterns. The case study involving object-oriented design with the UML is an important addition to Java How to Program, Fourth Edition. This tour previews the contents of the Thinking About Objects sections and discusses how they relate to the case study. After completing this case study, you will have completed an object-oriented design and implementation for a significant Java application. Section 1.15 Thinking About Objects: Introduction to Object Technology and the Unified Modeling Language This section introduces the object-oriented design case study with the UML. We provide a general background of what objects are and how they interact with other objects. We also discuss briefly the state of the software-engineering industry and how the UML has influenced object-oriented analysis and design processes. Section 2.9 (Optional Case Study) Thinking About Objects: Examining the Problem Statement Our case study begins with a problem statement that specifies the requirements for a system that we will create. In this case study, we design and implement a simulation of an elevator system in a two-story building. The application user can create a person on either floor. This person then walks across the floor to the elevator, presses a button, waits for the elevator to arrive and rides it to the other floor. We provide the design of our elevator system after investigating the structure and behavior of object-oriented systems in general. We dis Copyright 1992 2002 by Deitel & Associates, Inc. All Rights Reserved. 7/8/01
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