Computer Science 202
Introduction to Programming

Fall 2013, The College of Saint Rose

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Class examples will be linked below. Please report any missing examples.

Java and Objectdraw Basics

• TouchyWindow - basic event handlers and Text object
• ColorEvents - more graphics primitives, more event handlers, setting colors.
• SunAndMoon - moving objects in response to events
• MouseDroppings - accessing the mouse location
• Spirograph - remembering a mouse location in an instance variable
• Scribble - update the saved location on each drag event
• RubberBand - changing the endpoint of a line

Conditionals and Numbers

• ClickCounter - using an int variable, changing the contents of a Text object, constructing a string from an int
• Rectangles - basic conditional, the null object
• NudgeBall - testing for containment of a point in a graphics object
• ColorfulSpirograph - RandomIntGenerator to select among a limited set of colors
• MoreColorfulSpirograph - generating a custom color (randomly)
• CrazyColorfulSpirograph - even more random colors
• UglyDragABall - dragging an object, but not very nicely
• DragABall - dragging an object much more nicely
• Basketball - more interesting dragging application
• Basketball2 - dynamic canvas size, font sizes, centering objects
• ColorfulSunset - doing math on color
• FourVoting - more complicated conditionals

Java Applications

• Seuss - a Java application, with only System.out.println
• HelloYou - a Scanner for keyboard input
• Rectangle - the nextInt method of a Scanner
• BooleanDemo - an example showing Scanner's nextInt and demonstrating lots of logical operations
• NoInterestLoan - using JOptionPane and the Integer.parseInt method
• BasketballName - using a JOptionPane in an applet (i.e., a WindowController)
• RunsScored - somewhat more complex example of a console application

Repetition

• RailroadClick - click to cause repetition
• Railroad - a while loop for repetition
• PerfectSquares - a while loop in a text application
• GraphPaper - two while loops to create graph paper
• RandomOvalsOnClick - a while loop to draw 100 dots with random colors and random positions on each click
• MassPikeTolls - System.exit(1), error dialogs, String equals method
• MassPikeTollsBetter - better error checking using while loops
• Checkout - the do-while statement, the += shorthand notation
• Sum1To10 - the for statement
• Countdown - counting down with a for loop
• Sum2ToNBy2 - the for statement counting by 2's
• GeometricFractionalSum - a counting loop with a second variable changing on each iteration
• Snowman - importing and using graphical images
• SnowyNight - lots of graphical images
• Knitting - a nested loop structure

Methods

• BaaBaaBad - motivating example for methods
• BaaBaaBetter - defining a static method
• BaaBaa2Methods - 2 methods
• NumberInfo - a method that takes a parameter
• HoursWorked - passing a String to a method, and usins a Scanner to break it into components
• HoursWorked2 - same example, but pass in the Scanner as a parameter
• SumOfSquares - a method that takes two parameters
• Sum1ToN - a method that returns a value
• Sum1ToNBetter - a better version of the previous method
• Distance - a method that computes the distance between two points in the plane
• GradingBreakdown - a longer program that reads lots of inputs, just screaming out for a method to help organize
• GradingBreakdownBetter - the same program with a method introduced to organize the code better
• DrawFlags - more nested loops, private methods, this time with graphics

Random Numbers

• RandomDemo - examples of how to generate various types of random numbers in standard Java
• GuessingGame - a random number for a children's guess the number game
• MonteCarloPi - using random numbers to approximate Pi, Math.sqrt
• MonteCarloPiVisual - an Objectdraw version of the Monte Carlo method to approximate Pi

File I/O

• HelloWorldFile - opening a file for output with a PrintWriter
• CircleAreas - read in numbers from a keyboard, print circle radii to a file
• AddNumbersFromFile - read in a fixed number of numbers from a file, add them up, a file Scanner
• AddNumbersFromFileSentinel - read in numbers from a file, add them up, ending with a sentinel value
• AddNumbersFromFileAll - read in numbers from a file until no more numbers are available (end of file), Scanner's hasNextInt method
• WordCount - count the number of words in an input file, Scanner's hasNext method
• Shout - read in a file, print its contents to another file but with all words upcased, Scanner's hasNextLine and String's toUpperCase method.

The switch Statement

• CSOfficesIfElse - motivational example for switch statements
• CSOfficesSwitch - use of switch statements
• LittlePrimes - a switch with multiple cases executing the same code