galton
Class BallDrop

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Panel
                    |
                    +--java.applet.Applet
                          |
                          +--edu.davidson.tools.SApplet
                                |
                                +--galton.BallDrop

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.image.ImageObserver, java.awt.MenuContainer, java.lang.Runnable, edu.davidson.tools.SDataSource, java.io.Serializable

public class BallDrop

extends SApplet

implements java.lang.Runnable, edu.davidson.tools.SDataSource

BallDrop is an 'applet' that manages a set of Ball objects that are falling through a set of pins. This serves as an example of double buffered animation and the use of Java as an educational tool. What can you learn from this Applet? Probably that there are several correct ways to do the same thing, and that this isn't one of them.

See Also:

Serialized Form

Fields inherited from class edu.davidson.tools.SApplet

clock, dataConnections, dataListeners, dataSources, lock

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

BallDrop()

Method Summary

void	destroy()
void	forward() Start clock.
double	getMean()
SApplet	getOwner()
double	getStDev()
double[][]	getVariables()
java.lang.String[]	getVarStrings()
void	init() The code that initializes the applet.
boolean	mouseDown(java.awt.Event e, int x, int y) Stop the animation when the user clicks on the applet.
void	paint(java.awt.Graphics g) Paint the next frame in the animation
void	pause() Pause the clock.
void	reset() Reset the clock to time=0.
void	run() The thread has begun to run
void	setDefault() Reset the clock to time=0.
void	setOwner(SApplet owner)
void	setShowFunc(boolean value)
void	start() Begin the animation thread
void	stop() Stop the tread
void	update(java.awt.Graphics g) Just call paint() so that the background color isn't painted also

Methods inherited from class edu.davidson.tools.SApplet

addDataListener, addDataSource, cleanupDataConnections, clearAllData, clearData, deleteDataConnection, deleteDataConnections, getClockID, getClockTime, getDataConnectionFromDL, getDataConnectionFromDS, getDataFromDS, getDataListener, getDataListener, getDataSource, getDataSource, getID, getRunningID, getSourceData, getSourceVariables, isAutoRefresh, isClockRunning, makeDataConnection, removeDataListener, removeDataSource, reverse, setAutoRefresh, setClockContinous, setClockCycle, setClockOneShot, setClockTime, setConnectionBlock, setConnectionListener, setConnectionSmoothing, setConnectionSource, setConnectionStride, setDt, setExternalClock, setFPS, setRunningID, setRunningID, setTimeContinuous, setTimeCycle, setTimeOneShot, startClock, stepClock, stepTime, stepTimeBack, stepTimeForward, stopClock, updateDataConnection, updateDataConnections

Methods inherited from class java.applet.Applet

getAccessibleContext, getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, remove, remove, removeAll, removeContainerListener, removeNotify, setFont, setLayout, validate

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, addPropertyChangeListener, bounds, checkImage, checkImage, contains, contains, createImage, createImage, disable, dispatchEvent, enable, enable, enableInputMethods, getBackground, getBounds, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getLocation, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface edu.davidson.tools.SDataSource

getID

Constructor Detail

BallDrop

public BallDrop()

Method Detail

destroy

public void destroy()

Overrides:

destroy in class SApplet

forward

public void forward()

Description copied from class: SApplet

Start clock.

Overrides:

forward in class SApplet

getMean

public double getMean()

getOwner

public SApplet getOwner()

Specified by:

getOwner in interface edu.davidson.tools.SDataSource

getStDev

public double getStDev()

getVariables

public double[][] getVariables()

Specified by:

getVariables in interface edu.davidson.tools.SDataSource

getVarStrings

public java.lang.String[] getVarStrings()

Specified by:

getVarStrings in interface edu.davidson.tools.SDataSource

init

public void init()

The code that initializes the applet. Loads in the images for the balls and pins using the MediaTracker. Also start out the balls with a little nudge to get them going.

Overrides:

init in class java.applet.Applet

mouseDown

public boolean mouseDown(java.awt.Event e,
                         int x,
                         int y)

Stop the animation when the user clicks on the applet.

Overrides:

mouseDown in class java.awt.Component

paint

public void paint(java.awt.Graphics g)

Paint the next frame in the animation

Overrides:

paint in class java.awt.Container

pause

public void pause()

Description copied from class: SApplet

Pause the clock.

Overrides:

pause in class SApplet

reset

public void reset()

Description copied from class: SApplet

Reset the clock to time=0.

Overrides:

reset in class SApplet

run

public void run()

The thread has begun to run

Specified by:

run in interface java.lang.Runnable

setDefault

public void setDefault()

Description copied from class: SApplet

Reset the clock to time=0.

Overrides:

setDefault in class SApplet

setOwner

public void setOwner(SApplet owner)

Specified by:

setOwner in interface edu.davidson.tools.SDataSource

setShowFunc

public void setShowFunc(boolean value)

start

public void start()

Begin the animation thread

Overrides:

start in class java.applet.Applet

stop

public void stop()

Stop the tread

Overrides:

stop in class java.applet.Applet

update

public void update(java.awt.Graphics g)

Just call paint() so that the background color isn't painted also

Overrides:

update in class java.awt.Container