Introduction to Computer Science using Java
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Copyright © Bradley Kjell
Introduction to Computer Science using JavaBradley Kjell, Central Connecticut State University
This is a first course in Computer Science using the programming language Java. It covers the fundamentals of programming and of computer science.
For maximum benefit, go though these notes interactively, thinking about and answering the question at the bottom of each page. There are about 15 pages per chapter. If you spend about 3 minutes per page each chapter will take about 45 minutes; much more, if you copy and run some of the programs. If you are a beginning programmer, plan on spending more than a month with this.These notes assume that you have the Java Development Kit (JDK) version 1.3 or later from Sun (http://www.javasoft.com) and a text editor such as NotePad. They may be used with more sophisticated environments, as well. For more about these notes check the frequently asked questions.
CHAPTER 5—Introduction to Java
The previous chapters have discussed computer hardware, computer software, bits and bytes, machine language, language translation, language interpretation, and virtual machines. This chapter assumes that you know all that and are ready to look at Java.
These notes, assume you are using the Java Development Kit (JDK) version 1.3 or higher. The current release is version 1.4 (as of May, 2002). Earlier versions will usually work for these notes and may be easier to obtain (perhaps on a CD that came with a book.)
To run Java you need a computer that is running one of
These Notes were prepared using Windows NT 4.0 (but with minor mental adjustment will work with any OS.)
The Java Development Kit (JDK) is a
collection of software available at no charge from Sun Microsystems,
Inc. At the time of writing (May 20, 2002) the download is available at
java.sun.com. Detailed instructions on how to download it and install
it are available at that site. If you have not yet installed Java, get
the most recent version. The JDK for Windows comes in a file named
While you are at that site (or later if you don't have time) get the
This comes in a file
If clicking in the name of the file does not unzip it, you need to install (yet another) program on your computer.