Computer Science 252 Class Examples

Class Examples

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

Java Review 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
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
UglyDragABall - dragging an object, but not very nicely
DragABall - dragging an object much more nicely
ColorfulSpirograph - Random integer to select among a limited set of colors
MoreColorfulSpirograph - generating a custom color (randomly)
CrazyColorfulSpirograph - even more random colors
Basketball - more interesting dragging application
Basketball2 - dynamic canvas size, font sizes, centering objects
ColorfulSunset - doing math on color

Defining Classes

NiceBasketball - a fancy-looking basketball (that just sits there)
Arcs - examples of FramedArc and FilledArc objects
FancyBasketball - a class defining a fancy basketball which is used by another class to play our basketball game
DrawBBalls - lots of instances of the basketball
Drag2Shirts - two instances of a custom object
DragCars - example of another custom object with lots of methods
DoNotEnter - in-class example of a custom object

Repetition and Active Objects

RailroadClick - click to cause repetition
Railroad - a while loop for repetition
RandomOvalsOnClick - a for loop to draw 1000 dots with random colors and random positions on each click
DiagonalOvals - another while loop
Knitting - a nested loop structure
FallingBalls - a simple ActiveObject of falling objects
VanishingScribble - a scribble program enhanced with some active objects
PatheticPong - first attempt at a pong game, this one with a paddle that does not interact with the ball
LessPatheticPong - the ball can now be struck by the paddle
Pong - the ball can now bounce off the walls
TiltPong - communicating with the active object in pong
Snowman - importing and using graphical images
StayPuft - importing and using graphical images
FallingSnow - multiple active objects
WindyFallingSnow - falling snow with a "wind" active object

Java Interfaces

ShirtsAndPants - a Java interface to allow multiple laundry types
FallingThings - using Objectdraw's Drawable2DInterface to have a generic "falling thing" implementation
HandlingArrowKeys - how to handle arrow key presses and releases.

Swing

Recursive Structures and Methods

NestedSquaresLoop - loop-based nested squares
NestedSquaresRec - recursive constructor for nested squares
NestedSquaresDrag - drag around nested squares using recursive data structure and recursive move method
BigSnowman - another example of a recursive constructor and methods
NestedSquaresSizes - drag around nested squares but with multiple sizes, ability to set color or get info using recursive methods
Powers - compute powers (base raised to an exponent) iteratively and recursively
SimplestRecScribbler - defining a recursive scribble data structure
SimpleRecScribbler - using the recursive scribble data structures
RecWoodPile - a stack of wood to which we can add logs or remove logs only from the top
ChainReaction - another recursive data structure, combined with some animation
RecScribbler - adding a list of scribbles to allow dragging/coloring of all existing scribbles
Broccoli - a recursive structure representing a piece of broccoli
BroccoliBetter - a recursive structure representing a piece of broccoli using an interface to simplify code
LivingFractal - build a fractal shape recursively with an active object

Collections

Drag4Shirts - ArrayList motivation
Drag4ShirtsArrayList - ArrayList introduction
Drag10Shirts - ArrayList example
DrawRoads - draw segments of roads, using a loop to draw center lines
DragRoads - drag a segment of road, uses ArrayList to store road segment components
DragAllRoads - drag any segment of road, also uses ArrayList to store all road segments
DragAllRoadsRemove - add capability to remove road segments from the ArrayList
MovingFlags - adding a dragging capability to our flag example with ArrayLists
PongBricks - a pong game that can hit bricks
DragAllRoadsForeach - using a for each loop to iterate over ArrayList contents
CourseGrades - using ArrayLists to track students and their grades
Drag10ShirtsArray - first array example
Drag10ShirtsNicer - array with initializer
Drag20Shirts - reuse colors using modulo arithmetic
GradeRangeCounter - arrays of primitive types, initialized arrays
DragStudentsF14 - drag around pictures of students, using a random non-overlapping placement
SalesGraph - arrays and ArrayLists combined with some GUI and graphics - example partially developed in class
TicTacToe - 2D array example
Breakout - a breakout game using 2D arrays and lots of other fun things
Matrix2D - a two-dimensional matrix class with some basic methods

Strings and Characters

Hangman - the word guessing game, demonstrating more String and char/Character manipulations

Concurrency

Programming Without Objectdraw

Examples of Potential Use on Projects