Chapter1.1.Fall2009

Chapter1.1.Fall2009 - Java Software Solutions Chapter 1.1...

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1/73 Java Software Solutions Chapter 1.1 Computer Systems
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2/73 1. Computer Processing A computer system is made up of hardware and software . Hardware : Chips, keyboards, disks, wires, etc. Software : Programs and the data those programs use. Key Components of a Computer System central processing unit (CPU) input/output (I/O) devices main memory secondary memory devices
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3/73 Memory Programs and data are held in storage devices called memory , which fall into two categories : Main Memory (“primary memory,” “central memory”…) The storage device (e.g., chips on the mother board) that holds the programs and their data (software) while the programs are executing. Secondary Memory Devices such as hard disks that store software in a relatively permanent manner. We save our software on secondary memory . Copies of the software are brought into main memory when we execute our programs. Copies = data and programs
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4/73 Software Categories We will be concerned with two categories of software. The operating system . Provides a user interface that allows us to interact with the machine (enter input and view output). Manages computer resources such as the CPU and main memory. Provides protection, and much more. Application Software Generic term for just about any software other than the operating system. Word processors, spreadsheets (office tools), web browsers, games, hosts of search engines, twitter, facebook, …etc. Scientific applications; business / commercial applications… The focus of this course is development of high-quality application programs to be used in business / commercial applications.
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5/73 What This Means to Us We will be learning to create application programs using the Java programming language. We will be using an IDE called NetBeans. Current version of NetBeans is 6.7 but 5.0 and 5.5 should both be sufficient also. IDE stands for Integrated Development Environment . (Know this) There are many IDEs ‘out there.’
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6/73 More: What this means to us You will download and install the J2SE Standard Edition and Development Kit JDK and NetBeans 6.7 (bundled together) from links on my web page. See: Link to Download NetBean and Java. See the link on my web page and instructions to download and install NetBeans 6.7 and the Java JDK. See NetBeans Tutorial and Project0 Details are here. See also the tutorial on how to use NetBeans 6.7 to develop and submit Project0.
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7/73 Analog versus Digital Signals Analog information and/or signals are continuous , varying in direct proportion to the source of the information – like the amplitude of a wave may vary with volume. It’s period may vary with frequency… (Hz (frequency) measured in cycles per second; Period is seconds per cycle) Digital technology breaks information into discrete pieces and represents the pieces as numbers. Music on a CD is stored digitally, as a series of numbers.
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This note was uploaded on 07/26/2011 for the course COP 2551 taught by Professor Roggio,r during the Summer '08 term at UNF.

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Chapter1.1.Fall2009 - Java Software Solutions Chapter 1.1...

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