Download Math 107

Math 107
Introduction To Scientific
Programming
Acknowledgements …
Portions of these notes reproduce charts, slides, and tables from:
Java Software Solutions, 4th Edition (2005), by Lewis & Loftus
Java: An Introduction To Computer Science & Programming, 3rd Edition
(2004), by W. Savitch
Some screen shots are:
© Microsoft Corporation
Other Acknowledgements:
Solaris, Java, Java Beans, and JS2E SDK are © Sun Corporation
Windows and Window XP are © Microsoft Corporation
JCreator Pro and JCreator LE are © Xinox Corporation
S.Horton/107/Ch. 1
Slide 2
Welcome To…
Garbage in, Garbage out.
- A common programmer’s lament.
S.Horton/107/Ch. 1
Slide 3
Course Philosophy
I have three major instructional goals for this
class that can be summed up in:
“Scientific Software Development in Java”
S.Horton/107/Ch. 1
Slide 4
Course Philosophy - II
I.
Scientific

II.
Use computers to solve quantitative/scientific problems in
math, science, economics, …
Software Development

Learn the process used to develop successful software
programs;
Learn algorithms and special data/control structures to
solve problems;

III.
Java

S.Horton/107/Ch. 1
Learn a programming language called Java that can
instruct a computer how to operate and handle data.
Slide 5
Math 107 & 107L Logistics
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Syllabus Walkthrough
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Instructor/Contact Info
Course Material: Book/CD (Get Some Floppies)
Lab
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Hours: M-F 8:00 am – 6:30 pm (Check posting)
Computer Access – “Lab Packet”
JCreator download: http://www.jcreator.com/
Sun Java Web site: http://java.sun.com
S.Horton/107/Ch. 1
Slide 6
How To Succeed In This Class
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Read material BEFORE class
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Quickly setup/learn JCreator IDE
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Programming Projects
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Be prepared to iterate (cycle through multiple times)
Be prepared to spend more time on software
development outside of the lab
Optional – Setup JCreator outside of lab for
extra convenience
S.Horton/107/Ch. 1
Slide 7
Course Introduction
I.
Before software, there is hardware!
II.
Introduction to Java
III. Software design methodology
IV. Getting started
S.Horton/107/Ch. 1
Slide 8
I. A Crash Course in
“PC Computer Hardware”

You need to understand the hardware
platform before you develop software for it!
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Many types of hardware platforms
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PCs / Mainframes/ Laptops
Cell Phones / PDAs / Pocket PCs
Embedded Systems: Medical Devices, Machines, …
Different Computing Models
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S.Horton/107/Ch. 1
Client/Server, Enterprise/Server
Distributed (VPN)
Network Appliance/”Thin” Client
Mobile/Wireless
Slide 9
Simplified Schematic of PC
Architecture
CPU
RAM or DRAM
Software programs
routinely have to
manage some or all
of these resources
efficiently
Internet
Mouse
“Hard drive”
S.Horton/107/Ch. 1
Keyboard
Slide 10
Micrograph of CPU Core
CPU Memory
or “Cache”
ALU
S.Horton/107/Ch. 1
Registers
Control Unit
Slide 11
Simplified PC Program
Execution Model
1) OS loads executable code into Main Memory
2) Control unit fetches first line of executable code
3) Fetch-Decode-Execute cycle is initiated
S.Horton/107/Ch. 1
Slide 12
II. Introduction to JAVA

History

First conceived at Sun in 1991 to program
toasters!
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Inventor James Gosling apparently decided the
name while out at a (what else) coffee shop.
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Oak – To Java – To Java Eveywhere.

Recently, a big fight over Microsoft’s nonauthorized modifications for Windows (J++).
S.Horton/107/Ch. 1
Slide 13
Introduction to Java

Main Attributes

General purpose programming language with all
of the modern elements of OOP (encapsulation/
inheritance/ polymorphism…)
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Syntax similar to C/C++
 Portability - “Write once, run many…”
 Also runs in web browsers (Applets) which means
most types of computers
 Not controlled by Microsoft (controlled by Sun)
S.Horton/107/Ch. 1
Slide 14
The Java Software Development
Model – “Write Once, Run Many”
Input
JCreator
Portable
“Applets”
J2SE (MS Windows)
The biggest difference
between this and some other
development models is that
the compilation process has
been split into two parts
S.Horton/107/Ch. 1
Java Virtual Machine (JVM)
Slide 15
What Java Is Not –
Assembler Language
S.Horton/107/Ch. 1
Slide 16
The Popularity of Java The World Wide Web!
S.Horton/107/Ch. 1
Slide 17
UCSD Supercomputer Center
Internet Visualization Project
S.Horton/107/Ch. 1
Slide 18
III. Software Design Methodology Single Person Design Cycle
Debug
Code
Bullet-Proofing
Painful & Time Consuming!
Design
Run
Test
S.Horton/107/Ch. 1
Deploy
Slide 19
Major Goals in
Software Design
1. Operational (Customer)
•
•
Does it work?
Does it meet the design specification?
2. Performance (Customer)
•
•
Is it efficient (Speed/Memory/Disk Space)?
Can it handle errors?
3. Maintainable (Programmer)
•
•
S.Horton/107/Ch. 1
Is it understandable?
Is it modifiable?
Slide 20
IV. Getting Started!
1. Start the JCreator IDE
2. Input source code
3. Compile & Run
S.Horton/107/Ch. 1
Slide 21
JCreator Integrated Development
Environment (IDE)
S.Horton/107/Ch. 1
Slide 22
The Traditional And Famous
Hello World Program!
/*
*
*
*
*
*
*
*
*/
MyFirstJavaProgram is the Java version
of the famous and traditional Hello
World program which writes Hello world
to the console window.
Author: S. Horton
Date: 8/01/03
public class MyFirstJavaProgram
{
public static void main(String[] args)
{
System.out.println("Hello world!");
}
}
S.Horton/107/Ch. 1
Slide 23
Select New-File, Input A Name
& Path, Type Code Into Editor
S.Horton/107/Ch. 1
Slide 24
Click Compile, Check For
Errors, Click Run
S.Horton/107/Ch. 1
Slide 25
If You Succeed …
S.Horton/107/Ch. 1
Slide 26