CS 170 Java Programming 1. Welcome to CS 170. All about CS 170 The CS 170 Online Materials Java Mechanics: Your First Program

CS 170

Java Programming 1

Welcome to CS 170

All about CS 170

The CS 170 Online Materials Java Mechanics: Your First Program

What’s the Plan?

Topic I: What’s CS 170 All About?

Contact information

Topics, Goals and Objectives
Exams and Assignments

Textbook and software
Rules for the course

Topic 2: the online classroom, lessons and assignments
Topic 3: Java Mechanics

Learn to use the DrJava Development Environment
Enter, modify and run three kinds of Java programs

Contact Information

The syllabus is always available from my Web site:

http://faculty.orangecoastcollege.edu/sgilbert

Here’s how you can contact me:

Clark Computing Center, Office F

Office hours: M: 1:15-2:15, T: 3:15-5:15 , W: 10-11

Email: [email protected], [email protected]
Phone: (714) 432-0202 ext 21173

What’s CS 170 About?

First programming class for Computer Science majors

Intended as a transfer class to 4-year college

SMART-ICS agreement with UCI, CSU Fullerton

Meets computing requirement at some universities

Principles of programming, using Java as the language

Learn to write your own computer programs
This semester we'll also be processing media
A lot of work, but a lot of fun if you get into it

Are You Ready?

While there are no subject prerequisites for this course,

I assume that you are computer literate

Install and run programs

“Move around” your computer’s file system (copy, delete)
Use a zip/unzip program to work with archives

Create and save plain text files

Use the Web and email (upload, download, etc.)

Course Goals

If you successfully complete this class you'll:

Understand and explain principles of OO Programming

Prepare you for other modern languages

Use different kinds of program development tools

Write applications and applets using the fundamental

packages in the Java platform

Won't study all the classes; try to master a few

Learn how to use the Java documentation so it can teach

How Can You Succeed in CS 170?

Don't need to be a "brain" but must put in quality time

Like a marathon or getting in shape

Anyone can do it, but you have to keep at it

2.5 hours on-campus and about 12 hours outside

Includes 2.5 hours online lessons, 8 hours practice

Cramming won't help you at all; highly sequential material
Practice, practice, practice

How Will You Be Graded in CS 170?

Multiple-choice: 1-2 hrs closed book, online

10 Reading Quizzes: (7.5%) – online, open book

10 Programming Quizzes: (35%) – in-class, closed book

Hands-on proficiency demonstrations, some re-do

Weekly "labs" or "In-Class" exercises (7%)

Weekly Homework: practice for exams (15%)

1045 points, grade on 1000 (45 extra for emergencies)

Textbook

Introduction to Java Programming

Custom textbook for CS 170

Tony Gaddis-ISBN: 9780558618063
Available in the OCC bookstore ($75)

Includes 7 chapters from the 4th edition Starting Out With Java:

From Control Structures through Objects

ISBN: 978-0136080206.

Software and Supplies

Software is all free and cross-platform

At home, you can use Windows, Unix/Linux, Mac OS X
Use Java version 6 (may use 5 on older Macs (10.4))
An OCC-customized version of DrJava IDE

Can put everything on a USB thumb drive

Then you can work on almost any computer

Rules for the Course

May take Pass/Fail; request deadline on your schedule
No late work accepted

Assignments normally due by noon on Monday

45 points possible extra credit to cover "emergencies"
Don't wait until the last minute

Retry/makeup only for programming proficiency quizzes

May re-try up to 4 of the 10 PPQ exams

Pay attention to OCC drop deadlines: no Incompletes
Do your own work, and act like adults

Topic 2

The CS 170 Online Classroom

Getting Into the Classroom Getting Around the Classroom

Submitting Assignments and Taking Quizzes Reading the Online Lessons

Passwords and Logging In

A OCC Computing-Center password for the LAN

See the help-desk in the Computing Center for info

A MyOCC password to get into your email, etc.

Direct Log-on

Can log onto Blackboard directly (no MyOCC)

Still use your MyOCC password and ID

https://cccd.blackboard.com

Probably want to bookmark this

Half of your "class-time" will consist of online "lectures"

Blackboard Tutorials

You'll need to read the online tutorials to learn how to use

CS 170 Classroom

Quizzes

You'll take the reading quizzes online, outside of class

Assignments

Use the Assignment Drop-box to turn in IC assignments

Your "IC" or "Lab" Document

Will submit an "in-class" lab document each week.
Use Word or OpenOffice to create a new document

Save the file as IC01.doc (Office 97-2003 compatible)
Place on your network U: drive or on a thumb drive
Put your name and today's date at the top of the sheet
Title it "CS 170 In-class Exercise 1"

Save and close, upload to Blackboard and submit.
Exercise 1.1: show me your assignment submitted
Retrieve and discard uploaded file when done.

Weekly Lessons

Homework Assignments

Exercise page at bottom of weekly start page

Directions, points, submission instructions
Start working on Homework 01 now

Topic 3

Hands-On: Java Mechanics

How are Java programs created? What steps do you follow?

Step 1: Write the Code

Use a text editor to write your programming instructions in the Java language

Notepad, SciTE, vi, TextWrangler or an IDE

We'll use DrJava

Called source code
Save in a file with

Step 2: Compile the Code

Use a Java compiler to translate your source code into

executable machine code

javac in the JDK

Called bytecode
Stored in a file with

the extension .class
If syntax errors occur,

Step 3: Run your Program

Use a Java Virtual Machine (JVM) to load the bytecode,

translate into native machine code and start it running

Applications: java.exe

or javaw.exe

Applets: HTML

Web browser, appletviewer

If runtime errors occur,

Your First Java Program

We'll first write an application using the DrJava IDE

Exercise: copy the cs170home-F10 folder from Q: and

place (drop) it on your U:\ (network) or USB Thumb drive

Starting DrJava

Exercise: start the DrJava IDE by opening the tools

Logging In

Type your last name and student ID to start DrJava.

Student ID must start with C

Skip any spaces in your last name
If you aren't registered or are

not connected to the Internet, then select Guest Access

Logging-in is needed to record the score for your homework assignments

Preview: Java Syntax

Every Java program is a class definition

Class definition is a blueprint to construct objects
The basic class structure looks like this:

… some stuff

public class SomeClassName {

… some more stuff }

Must be stored in SomeClassName.java
Only one public class per file

Step 1: Edit the Source Code

Q:\faculty5\sgilbert\cs170\edit-program01.gif
Right-click, "Preview"
Type in code, replacing noted portions

Save the file

when done

Exercise 1.2

Step 2: Compiling Your Program

Right-click to compile a single file

When Bad Things Happen

or Compiler Errors

Syntax must be 100% correct for a program to run
Capitalization: (System not system, String not string)
Spelling the name of your source file incorrectly

Forgetting or mismatching the number of braces
Mistaking parentheses for braces

Misspelling the name of a variable

Edit and then recompile until there are no errors

Exercise 1.3

Step 3: Running Your Program

You can use the menu command Tools->Run Document,

Viewing the Output

Program is run in DrJava's Interactions Pane
Can view just output in Console Pane

Exercise 1.4

Testing Your Code

Program may not do what you want (logic error)
Test by comparing actual and expected output

I'll supply tests for first few weeks. Later you'll learn how to write your own test programs.

Testing Your Code

Check program looks for existing test sets.

Test Results

Results appear in Interactions and Console panes

Exercise 1.5

Check your Style

Portion of your grade based on program style

Fix Style Errors

Checkstyle shows errors in external process pane:

Correct all style errors by checking line number

Exercise 1.6

GUI App and Java Applet

Compile and run a Java GUI application
Compile and run a Java applet

Shoot screen-shots
Submit to Blackboard

Instructions are in online lesson on Blackboard

Finishing Up

Reading for next week:

Mediacomp: read Chapter 1 and start Chapter 2
Gaddis: start Chapter 1

Homework, Quiz and Assignments

Deadline is Tuesday at noon because of Labor Day
Introduce yourself on discussion board

Three homework problems