Introduction to Programming using Java as the programming language

ninetimesdissemblingSoftware and s/w Development

Nov 10, 2012 (4 years and 5 months ago)

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Welcome to ENGR 2304/COSC 1336
Engineering Programming

Want to be a “Lean, mean programming machine . . .”


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Welcome to ENGR 2304/COSC 1336
Engineering Programming


My name is Dick Whipple


BSEE, MSEE from UH


Designed and programmed computers for 25 years


The course, ENGR 2304/COSC 1336 . . .


Is designed as a first programming course.


Is widely accepted for transfer.


Will use Java as the programming language.


Will focus on engineering problem solving.


Is WebCT enhanced with lab on Internet.


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Very Important Information

Objectives for
Thursday


Access course on my website

http://tech.swtjc.net/whipple_online/


Logon to WebCT & this class
http://70.241.209.12/webct/public/home.pl


Add both links to your favorites!


Review the syllabus


Start Assignment 1


Read Chapter 1
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1 of the text, Java Software
Solutions by Lewis and Loftus


Install JBuilder from CD
-
ROM

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Class Attendance


Attend class regularly


Class begins promptly At 8:00 AM


Class WebCT enhanced including . . .


Access to study materials


Lecture PowerPoints


Videos


Other readings


Complete/submit lab assignments

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Demonstrate Responsibility


Read and follow instructions to the letter.


Read and study all assigned “Text Readings”.


Research the Internet as directed.


Utilize WebCT as an enhancement to the course.


Ask questions when you don’t understand.


Complete work on time and without weak
excuses.


Take your first steps as a “Professional”!

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Computers Are Not Magic

"There is nothing magic about computers.


Any answer that a
computer can arrive at could also be arrived at by a human if
he/she lived long enough, had enough pencils, etc.


What's
important to remember is that,
regardless of the speed at which a
computation is done, the process is a straightforward,
one step at a
time
, matter
."

"That isn't to say that a person or persons can solve any
problem a computer can.


Sometimes temporal (time)
problems are a part of the problem.


The numbers which tell
the rockets of a space ship what to do after the first stage lets
go can't take six months for a human to compute with paper
and pencil.


If more than a second or so is required, a satellite
may be falling down someone's chimney."

Michael Kennedy and Martin B. Solomon

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Communicating with Computers

"A person who wants to use a computer must learn to be
precise.


One does not communicate with a computer by hand
waving and mumbling.


A computer can be of service only if it
is instructed
carefully

and
according to preset rules
."

Michael Kennedy and Martin B. Solomon


As a student in ENGR 2304, I expect you to follow this
admonition to the letter.


If you are not willing to do so, this class may not be for you!

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Purpose of a Programming
Language


The purpose of a programming language is to
facilitate communication between humans and
computers.


Computers are very accurate and fast at following
instructions, but understand only “bits and bytes”.


Humans know what instructions to give, but cannot
easily give them to computers in “bits and bytes”.


Computer languages bridge the gap!

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Examples of Programming
Languages


Java, Visual Basic, & C++ are multipurpose languages.


Fortran & Aida are scientific languages.


Cobol is a business language.


Assembly languages create fast, compact code for 3D
animation and gaming.


Markup languages like HTML are Internet based.


Scripting languages like JavaScript perform utility duty.

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History of Java


Developed at Sun Microsystems in early 1990’s.


Development team led by James Gosling.


Originally called Oak and used in embedded
consumer electronic applications.


In 1995 renamed Java and redesigned for Internet
applications.


Gained renown as a general purpose programming
language.

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Characteristics of Java


Simple, modeled after C++ but easier to use


Object oriented, not procedural.


Distributed, adaptable to networking environments


Interpreted, runs on almost all computers


Robust & reliable; emphasizes error checking & good habits


Secure, will not damage a computer


Architecture neutral, platform independent


Portable, runs without being recompiled


Performance good though not the fastest


Multithreaded, performs several tasks at once


Dynamic, adapts to evolving environment

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Java’s Relationship with

World Wide Web


HTML is the authoring language for WWW.


Java programs run from browser.


Java makes the web environment “smarter”.


Java adds responsiveness and interactivity.


Java uses modern GUI interface.


Java enhances web graphics.


Java allows the web page to respond to user events.

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Java Development Environments


Sun Microsystems provides JDK (Java Toolkit)


JDK is basic and simple, but inefficient as design tool.


Other environments are better


NetBeans from Sun


JBuilder from Borland (we will use this!)


Visual Café from Webgain


Visual Age from IBM


Visual J++ from Microsoft

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IDE NetBeans


Easy to learn


Simple to use


Adaptable to user requirements


Readily navigated to access . . .


packages


projects


programs


classes


code elements

NetBeans provides an IDE (Integrated Development Environment)

that is . . .

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Installing NetBeans


Download NetBeans from:

http://java.sun.com/javase/downloads/netbeans.html



Run the “.exe” file


You’ll be ready to “Run” your first program in not time!.

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Elements of AppBrowser Window

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Types of Java Programs


Application

-

A stand alone program written with a high
level language such as Java.


Executed from the computer by a Java interpreter


Not subject to security restrictions


Must contain a “main” method


Applet

-

Special kind of Java program that runs from a web
browser or applet viewer.


Subject to security restrictions


Cannot make changes to user’s system


Cannot read or write files


Cannot transmit computer viruses

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Java Program Components

Java’s programming components:

Packages
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Collection of classes (Programs)

Classes
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Collections of data and methods that operate on data

Methods
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Collections of statements that operate on

data

Variables
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Stores data

Constants
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Stores data that doesn’t change

Literals
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Explicitly given data

Data
{

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Java Programming Process






1.
Create source code.


Programmer creates source.


Stores in
filename.java

.

2.
Compile source.


Converts source code to bytecode.


Stores in
filename.class
.

(Ready to execute.)

3.
Execute bytecode in
filename.class
.

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Steps to Create a Program

1.
Create a Java project.

2.
Create a Java application program.

1)
Create a new class.

2)
Create the main method.

3.
Compile and execute


“Run” the application.

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First Program with JBuilder

/*


My First Program

*/

public class HelloWorld

{



public static void main(String[] args)



{




// Declare variables


// Input data


// Process data


// Output Results


System.out.println("Hello World");



}

}

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What to do now?


Click on “Online Classes” at SWTJC’s homepage.


Click on “Class Schedule and find this class.


Link to my homepage and click on ENGR 2304.


Follow the instructions there for New Students.


Complete Assignment 1 by Thursday, February 4, 2010.