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

Transcription

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

2 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

3 Contact Information The syllabus is always available from my Web site: 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: [email protected], [email protected] Phone: (714) ext 21173

4 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

5 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 (upload, download, etc.) No math pre-req, but should be ready for college algebra

6 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 you about the rest of the classes in the library

7 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 Not high-school; I won't nag you

8 How Will You Be Graded in CS 170? 2 Exams: 1 midterm (15%.), 1 final (25%) 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) 87.5%, 75%, 62.5%, 50% - no other curving

9 Textbook Introduction to Java Programming Custom textbook for CS 170 Tony Gaddis-ISBN: Available in the OCC bookstore ($75) Includes 7 chapters from the 4th edition Starting Out With Java: From Control Structures through Objects ISBN: May purchase complete text from Amazon, etc.

10 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 Transfer files using Blackboard or get a Dropbox account

11 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

12 Topic 2 The CS 170 Online Classroom Getting Into the Classroom Getting Around the Classroom Submitting Assignments and Taking Quizzes Reading the Online Lessons

13 Passwords and Logging In You'll have two passwords for this class 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 , etc. Use your MyOCC password to get into the classroom

14 Direct Log-on Can log onto Blackboard directly (no MyOCC) Still use your MyOCC password and ID Probably want to bookmark this Half of your "class-time" will consist of online "lectures" Much of the on-campus work will be hands-on

15 Blackboard Tutorials You'll need to read the online tutorials to learn how to use the online environment (Blackboard Vista)

16 CS 170 Classroom Here's what the CS 170 "online" classroom" looks like:

17 Quizzes You'll take the reading quizzes online, outside of class That means, of course, that they are "open book"

18 Assignments Use the Assignment Drop-box to turn in IC assignments May retrieve assignments up to deadline

19 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 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.

20 Weekly Lessons Each week, I'll have a "start-page" to the lessons:

21 Homework Assignments Exercise page at bottom of weekly start page Directions, points, submission instructions Start working on Homework 01 now

22 Topic 3 Hands-On: Java Mechanics How are Java programs created? What steps do you follow? What tools do you use?

23 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 the extension.java

24 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, return to text editor

25 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, return to text editor

26 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 Q:\faculty5\sgilbert\cs170\cs170home-F10

27 Starting DrJava Exercise: start the DrJava IDE by opening the tools folder and double-clicking OCDJ-Fall10.jar

28 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

29 The DrJava IDE

30 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

31 Step 1: Edit the Source Code Find source code for program at: Q:\faculty5\sgilbert\cs170\edit-program01.gif Right-click, "Preview" Type in code, replacing noted portions Save the file when done Exercise 1.2 Screenshot of source

32 Step 2: Compiling Your Program Several ways to compile your code when saved Right-click to compile a single file Use Compile button to compile all files in Files Pane

33 When Bad Things Happen Common Syntax or Compiler Errors Exercise 1.3 Screenshot of clean compile 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

34 Step 3: Running Your Program You can use the menu command Tools->Run Document, press the F2 key, or click the Run button on the toolbar

35 Viewing the Output Exercise 1.4 Screenshot of output Program is run in DrJava's Interactions Pane Can view just output in Console Pane

36 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. Click the Check button in the menu bar

37 Testing Your Code Check program looks for existing test sets. Select Week 1 and then MyFirstConsoleProgram, click OK

38 Test Results Exercise 1.5 Screenshot of all tests passing Results appear in Interactions and Console panes

39 Check your Style Portion of your grade based on program style Can check that by running the Checkstyle program

40 Fix Style Errors Checkstyle shows errors in external process pane: Correct all style errors by checking line number Exercise 1.6 Screenshot of clean style check

41 GUI App and Java Applet To complete your IC "lab" document: 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 May complete this outside of class

42 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 Upload to Assignment Dropbox. Make sure to press Submit