css 161 fundamentals of computing introduction to computers & java september 26, 2012 css 161:...

CSS 161: Fundamentals of Computing

CSS 161Fundamentals of Computing

Introduction to Computers & JavaSeptember 26, 2012

Instructor: Uma Murthy

CSS SKL 161 A Instructor: Joe McCarthy


Outline

• Update / reminder• Introduction to Computers• Introduction to Java


Updates

• Assigned readings– Any material in assigned readings

is potential fodder for exams, regardless of whether we cover it in a lecture, lab or assignment

• Slides will always be posted on web site– Typically, shortly after each class

• Please complete survey by Friday, Sep 28


Required Textbook

Absolute Java, 5th Edition Walter Savitch & Kenrick MockAddison-Wesley, 2013

4th Edition OK, too


Supplemental Material (1/2)

Java: An Introduction to Problem Solving & Programming, 6th EditionWalter SavitchAddison-Wesley, 2012

http://courses.washington.edu/css161/joemcc/Notes/SavitchCh01.pdf

(access via “Notes” link on course homepage)




Supplemental material (2/2)

• Practice It!http://webster.cs.washington.edu:8080/practiceit/

• Instructions to be provided in the coming weeks

http://webster.cs.washington.edu:8080/practiceit/


Experimentation via programming

“Do not be too timid and squeamish about your actions. All life is an experiment. The more experiments you make the better.”

- Ralph Waldo Emerson

Corollary: All programs are experiments.The more programs you make the better.


Other introductory CS courses


Java

• Goal:– Write once, run anywhere– JDK: Java Developers Kit– JRE: Java Runtime Environment

• Editions– SE: Standard Edition– EE: Enterprise Edition– ME: Micro Edition (mobile, embedded)– Embedded: flash memory, closed systems

• Versions– 1.0 (1992), .. 1.6 (2006), 1.7 (2011)


Downloading Java [optional]

• http://www.java.com/getjava/– Current: Version 7 update 7 (1.7u7)• On Mac, requires Mac OS X 10.7.3 or higher

– Can also use Version 6 update 35 (1.6u35)• http://www.java.com/en/download/manual_v6.jsp• Supported thru February 2013

• We will be writing Java, so we want JDK– Which includes JRE

http://www.java.com/getjava/






http://www.java.com/en/download/manual_v6.jsp

http://www.java.com/en/download/manual_v6.jsp


Integrated Development Environments(IDEs)

• Programming tools– Edit text (code) + compile + run– Graphical representations of components

• We’ll be using BlueJ, but you can use others

netbeans.orgeclipse.orgbluej.org


Downloading BlueJ [optional]

http://www.bluej.org/download/download.html




Computers


Computer Hardware


Computer Software


Note: program must be loaded into memory in order to execute


Computer Memory


Computer Memory

Alternate perspectives:

Key attributes: addressable / labeled locations that can store things


Computer Disk(s)


Computer Disk(s)

Alternate perspectives:


Hierarchy of Memory

Variables?

[CSS 422 and CSS 430 go into much further depth]


Hierarchy of Memory

Variables:• Speed• Cost• Size• Volatility

[CSS 422 and CSS 430 go into much further depth]


[In Mac OS X Terminal window]

localhost:code umurthy$ ls FirstProgram*FirstProgram.javalocalhost:code umurthy$ javac FirstProgram.java Localhost:code umurthy$ ls FirstProgram*FirstProgram.class FirstProgram.javaLocalhost:code umurthy$ java FirstProgramHello reader.Welcome to Java.Let's demonstrate a simple calculation.2 plus 2 is 4Localhost:code umurthy$


Next time

• LAB 1 on Friday• Homework 1 handed out on Monday• Console input and output

css 161 fundamentals of computing introduction to computers & java september 26, 2012 css 161:...

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