• iClicker policy
• Computing on paper tickets (Euclid's algorithm using subtraction)
• The same computation on Java variables in DrJava's interaction window.

• iClicker Registration
• Getting DrJava, the book classes, and the media sources
• Getting the Java Development Kit from Oracle

• Review lecture computation on paper.
• Get DrJava running in Lab.
• Euclid's algorithm with remaindering on paper with DrJava's help.
• Lab Assignment pages 1-2
• Lab Assignment pages 3-4 lecture computation review and in-lab worksheet
• 4 after-Lab question due on Blackboard Jan 29, Sun. night.

• Euclidean algorithm Wikipedia article: Nice picture from Euclid! Examples and real applications too.

• Lecture Notes 02: Many points from the lecture in written/outline form.
• Java statements demonstrated
• Complete program developed and RUN:
  1. Makes a World.
  2. Makes a Turtle that starts out in the center of that World.
  3. Commands that Turtle to go forward, which traces a vertical line.

• UA Information Commons Computers:
  • Start DrJava from the Java Development Tools submenu
  • You'll have to download and unzip the book classes, as shown in the lecture (download and unzip the media sources too to get sample digital image files.

• Review written lecture notes linked above..
• iClicker Quiz on the reading.
• Improvised class discussion covering names of tickets, int versus double (number-holding) tickets, are tickets with different names different tickets or not (iClicker question)?
• Explain the program with the Turtle line by line
• World reference, World instance, Turtle reference, Turtle instance made by hand

• The difference between int and double matters: How a spacecraft FAILED because some programmer didn't learn his/her 201 lessons about the overflow issue pertaining to int versus double types, which will be taught soon.

• Read (3.4) BEFORE lab..bring it in, too!
• Download book-classes into your ITSUNIX home directory (is your UA S: drive)
• Write comlete programs that make Turtles draw cool simple figures.
• After lab, find them on your S: drive or ssh access to itsunix.albany.edu and upload a complete Java program to Blackboard for grading and credit.

• Lab 02 Assignment Sheet
• Lab 02 In-Lab checkoff-grading sheet

• Project 1 Assigned Due Feb 15, Feb 8 Early Bird Bonus..
• Discussion: What does it mean to execute or run a program? Prof's view: Give the program control of the computer.
• Begin step-by-step design and coding of complete Java program to draw stuff.
• Clicker Questions.
• Draw an L or a J, depending on class opinion.

• Directory with the sequence of versions developed in the lecture.

• Introduce the Web copy of the USB drive directory in which in-class programs are developed.
• Demonstrate a run of, then explain line-by-line, the program from Lecture 04
  • Reminder: In Java, = doesn't mean equals, it means copy from the right side into the "ticket" named on the right.
  • Demo of opening and compiling the World.java file in the book-classes directory, when World was announced as an unknown class World symbol.
• Do NOT go beyond one letter until after you know how to make and use your own methods with parameters effectively: The reading topic of 3.5. Otherwise you will waste your time!
• Demonstrate a workflow of renaming and saving over and over to capture a history of versions.
• Changing pen width,
  • how the order of Java program statements matters
  • programming requires good guesses and choices sometimes; precise decisions are needed.
  • Graphics coordinate system
  • moving Turtle to the corner
  • lifting pen before move and lowering it after.
• Began to develop code to scale a letter--up to scaling only its first stroke.

  Compilation error from passing a double to the Turtle's forward( int ) method detected and fixed with

  mt.forward( (int) (defMoveLen*scale) );

  The multiplication is done with floating point numbers and then the fractional part is thrown away to get an integer number of pixels.

• Directory with the sequence of versions developed in the lecture.
• The difference between int and double matters: How a spacecraft FAILED because some programmer didn't learn his/her 201 lessons about the overflow issue pertaining to int versus double types, which will be taught soon.
• Only for the paranoid or rocket/biomedical programmers: OFFICIAL JAVA Specification rules for casting a floating or double to a integral type: Explains exactly how information about small numbers and large numbers will be lost!

• Lab 03 Assignment: Add a parameterized method to draw a square to the Turtle class.
• In-Lab grading sheet.

• Lect06 notes: NEW LAB Grade policy; Review bringing us up to parametrizing a letter.
• Give Turtles the method to draw L's or J's
• Make the L or J method drawer parametrized.

  The ONLY thing this version does is test that the drawL method was called. The drawL method only prints an announcement--no drawing was added to it yet!

• In-class 2 person partner excercise to teach what calling a method with a parameter really means.
  • World sheet
  • Calling cards (use one only)
  • Instructions.

Click here for video

ENIAC from LeAnn Erickson on Vimeo.

G&E Book Classes Documentation (javadoc.)

• SimpleTurtle
• Turtle

• Tutoring available LI-84

  Weds 11:00AM-3:00PM

  Fri 10:30AM-1:30PM

  Tutor has a CodeMate account

  More coodination w/201 TBA.

• Updated Lecture Slides

Lect 08(tent-from last year, not used.)

• Improved motorcycle program
• Directory including its result.

UnfinishedColorMaker Javadoc

TA instructions

Hundreds of palettes

1. For-loops
2. Arc Drawing

1. Project 02 Assigned:Due March 3.
2. Arrays
3. Project 02 readings: read as needed to do the project and to study for exams.

• Perceived Color
• Spectral Color
• Cone & Rod sensitivity from 7 people's eyes actually measured

1. Multiple ways of looping through pictures(Midterm info).

1. Multiple ways of looping through pictures(Midterm info), concluded.
2. Tips for the extra credit parts of Proj 2.

Midterm REVIEW QUESTIONS. EMAIL PROF before Tues, 3:00PM to suggest ones to review in class on Tuesday.

TA Instructions.

• if statement syntax
• What is syntax
• if statement flowchart

Application to chromakey and avoiding bad picture x,y indices.

Boolean values and the AND operation

• Java types int and boolean examples
• Example of a boolean expression
• relevance of this expression to pixel coordinates
• Operation table for addition, example
• The truth table telling what && (AND) means

640x480

cropped

1. V1 ball method sets just one Pixel red.
2. V2 " sets a square green.
3. V3 " sets a disk green (illustrates if statement)
4. V4 weighted average method (illustrates a method that returns a value; also illustrates a static method); ball color is expressed with integer intensities instead of Color.green
5. V5 ball method draws a ball where color ranges from white in the center to green on the edges (Fixed right after class by a student!) (illustrates the need to explicitly write cast to throw away the fraction when the double returned by the weAv method is truncated to an int.

Summary slides

Case Study: checkered pattern maker

1. Design notebook
2. Versions (V1 from lecture, V2 completed after lecture)

1. butterfly1small.jpg
2. Sample output
3. P3Tester.java testing progrm

Versions V1, V2 and V3 of GradeRecording program (Storing, printing and changing grades done with (1) separate variables and then (2) an array, much better.

Explanations/Questions about Project 3

Where a variable can be: 4 choices!

Patterns for Lab 11

1. Original Version
2. Add names of courses.
3. Search an array for something.

   How to use a Scanner? Search for "Java API Scanner" and select Oracle's Java API documentation.

4. Search an array for a maximum.
5. Insertion sort (not done yet.)

Making your own House class (after the Mad Ph.D.).

• House class definition
• House class tester.

Starting insertion sort(NOT FINISHED).

Project 4 Assigned

Lecture with Doc Cam sketches about purpose and technology of Java constructors.

• House built with NO CONSTRUCTOR
• House built with the constructor to set up the owner, number of books and the library with one book built in.

• AlbumTester.java
• Album.java (Stubs: Please use for your Version 0)

Project 4 How to do it version history

Project4 Link to directory of versions.

Make your V0 be exactly the original downloaded from the Web! Make sure it compiles and learn how it runs.

Class Q/A re. Project 4, different use-cases are set up by the 2 different constructors.

Looked at some Project4 directories of versions again.

Live code discussion of accumulating data in a object (a shopping Bill).

• Version 0
• Version 1
• Version 2 (with NOTES about making and using arrays)
• Version 3 (prepared after lecture)

ANNOUNCEMENT:

1. Kitware Flyer 1    Kitware Flyer 2      Wed., May 2 CCI-Women In Tech Meeting 4:00PM

DEPENDENCIES!!

1. Use case 1: Album(int,int) specify result dimensions but not the number of pictures.

   Use case diagram

   Sequence Diagram

2. Use case 2: Album(int) specify the number of pictures but make the computer compute the result dimensions.

   Use case diagram

   Sequence Diagram

• What is a dependency? Direction of the arrow defined.
• Copying colors depends on having a Picture to copy to.
• Dependencies when the result Picture must fit input Pictures exactly (for use case 2)
• if-else NEEDED in addPicture
• if-else (maybe with empty else) needed in getResult

Live coded Bill.java class with min and max price finders, recording the item with the highest price (comments added and code TESTED added after lecture!)

Flowcharts (Activity Diagrams) for the two separate use cases of Project 4.

Microsoft Visio 2010 (.vsd) source file

Web site about UML:

Link from OMG: The standards boss for UML

(At UA, we teach that in CSI418/518)

Bill.java with sort( ) method implemented.