CSC204 – Programming I

Lecture 1August 23, 2006

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Today’s Topics Syllabus – an introduction to the course Roster – introduce yourself to the class Get started- an intro to programming [next time – an intro to OOP with Java]

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About The Course Instructor

Martin Q. Zhao, Ph.D. 201 B Computer Science BuildingPhone: 301-2425Email: zhao_m@cs.mercer.edu

Text

Java Program Design 5.0

by Cohoon & Davidson Just Enough UNIX

by Andersen

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Course Description Learn how to program in Java Structured & object-oriented programming

basic syntax and semantics simple data types and control structures classes and objects arrays and graphics

Learn how to analysis, design, implement, test and debug programs

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Other Elements (for assessment purposes)

Computer Ethics A book will be loaned to you A class session and one lab will be used Test questions in the third mid term and the

final exam AP A test

Used as bonus points (up to 20)

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Grade Breakdown 

One hour exams (3 at 100 points each)

300 points

Comprehensive Final exam 200 points

Homework assignments (10 at 10 points each)

100 points

Programming assignments (6 total)

240 points

Lab assignments (14 total) 140 points

Maintain course portfolio 20 points

Total 1000 points

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Grading Policy900 or higher A

870-899 B+

800-869 B

770-799 C+

700-769 C

600-699 D

Lower than 600 F

Chapter 1

Getting Started

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What is Computer Science? Is computer science the science of

computers? Not exactly. It is the science of information

processes and their interactions with the world. It is the systematic study of algorithmic

processes that describe and transform information: their theory, design, efficiency, implementation, and application.

What is the main concern of computing? What can be (efficiently) automated?

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Areas of Computer Science algorithm and data structure programming languages computer architecture operating systems software engineering data and knowledge base systems artificial intelligence and robotics human-computer interface

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Automation Starts from Programs What is a program?

How can the instructions defined in a program be executed?

public class AutomatedProcess { public static void main(String[] args) { System.out.println("Step #1"); System.out.println("Step #2"); System.out.println("Step #3"); }}

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processor

Computer Architecture – a

simplified view

012345

4194300419430141943024194303

diskkeyboard

display

printer

memory

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Number Representation & More Decimal or binary representation?

What does computers use and why? Examples:

4,506 1101

Bit and byte What is the largest number that can be represented

with a byte?

Units of measure Time: ms, ns File size: KB, MB, GB, TB

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Software & Hardware Machine

language Assembly

language High-level

language

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Additional Background Info

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History of Java Java’s predecessor was Oak, a language designed

by James Gosling at Sun Microsystems. Oak was given the more-marketable name “Java”

in January 1995. Java was officially announced in May 1995. The first official release of Java occurred in

February 1996, when Sun made available version 1.0 of the Java Development Kit.

Java 1.2 (released by the end of 98) and higher is referred to as Java 2.

The latest Java version is 1.5, also known as Java 5.

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Why Java? Simple Object-oriented Platform independent

“Write once, runs everywhere!”

Built-in security Distributed Interpreted J2SE, J2EE, and J2ME targeted for various

development needs It’s free

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Interesting Links about Java General reading

http://java.sun.com/nav/whatis/index.html (A quick guide to the Java technology)http://www.zdnet.com/eweek/stories/general/0,11011,2804967,00.html (Study: Java to overtake C/C++ in 2002)

For those who have programming experience

http://java.sun.com/docs/books/tutorial/

Java API

http://java.sun.com/j2se/1.5/docs/api/

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What Do Computers Do? A computer system is an integrated collection

of hardware and software components. Hardware refers to the electronics inside a

computer. Software consists of programs that tell the

hardware what to do.

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Types of Computer Systems Some computer systems are embedded within

other objects. These are called embedded systems.

Other computer systems are intended for direct use by humans (users).

Some systems support multiple simultaneous users, while others are limited to one user at a time.

Systems in the latter category are usually called personal computers, although high-end single-user systems are often called workstations.

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Hardware Processors

Central processing unit, or CPU Specialized processors, such as a graphics processor

Memory Main memory, or RAM (random-access memory) ROM (read-only memory) Hard disks, floppy disks, and other storage media

Peripheral devices Provide an interface to the world outside the system Include keyboards, mice, monitors, printers, and

modems

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Software Software consists of programs that instruct the

hardware how to perform operations. A program is a step-by-step set of instructions. Categories of software:

Operating systems. A collection of programs that interact directly with the computer’s hardware.

Applications. Programs designed to perform useful tasks for humans.

We are writing this kind of programs. An operating system serves as a bridge between

hardware and applications.

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Platforms The combination of an operating system and a

particular type of CPU is often called a platform. Software usually works only on a single platform. Java programs, however, will run on multiple

platforms without change. This is usually referred to as good portability.

Most of the time, a computer system has only one operating system but many applications.

Applications are usually designed for one particular version of an operating system.

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File Systems A file is a collection of related data. In many operating systems, a file name

includes an extension that indicates the type of data stored in the file.

Common Windows file extensions:.exe (executable program) .doc (document).gif, .jpg (image)

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File Operations Basic file operations:

Create, Edit, Copy, Rename, Delete A file can be created or edited by using an

editor or word processor. An editor is a program that can create or

modify a file containing text (ordinary characters).

A word processor has the added ability to format text. It is usually not used in our class, except you want

to make your homework more impressive.

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Directories A directory is a place where files can be

kept. Directories are also known as folders.

Directories are normally organized in a tree-like fashion.

Basic directory operations: Create a directory Move from one directory to another List the files in a directory