Class ComplDemo

java.lang.Object
  java.awt.Component
      java.awt.Container
          java.awt.Panel
              java.applet.Applet
                  ComplDemo

All Implemented Interfaces:

ActionListener, ComponentListener, ItemListener, MouseListener, MouseMotionListener, ImageObserver, MenuContainer, Serializable, Runnable, EventListener, Accessible

public class ComplDemo
extends Applet
implements MouseMotionListener, MouseListener, ActionListener, ItemListener, ComponentListener, Runnable

Demonstration of complex arithmetics.

The operations +, -, *, /, exp(), log() on complex numbers as well as many other operations can be comprehended graphically.

ComplDemo can be embedded as Applet into a HTML page as well as used as a stand-alone application.
As application:

                java ComplDemo
 resp.           java -jar ComplDemo.jar  
 or              javaw ComplDemo
 resp.           javaw -jar ComplDemo.jar

The last possibility, the start by jawaw.exe from an archive you get on most Windows JDK/JRE installations by double clicking on the .jar file.
As Applet: (example)

     <applet code="ComplDemo.class" archive="compldemo.jar" 
     alt="Complex Applet" name="Comp1" width="500" height="328"
     hspace="8" align="right">

For the Applet you can

• make and deploy put a complete Java archive (here archive="compldemo.jar") containing all used (Frame4J) classes. As an application this jar will run independently of an installed framework;
  or
• make and deploy a minimal Java archive (here archive="compldemo14.jar") containing the class ComplDemo and requesting the framework Frame4J in its manifest. It will run on all up-to-date browsers if the framework is installed. The best of them will offer the web-start download of Frame4J if that framework should still be absent.

Hint: The last point will fail on some JRE=Java-plug-in / browser combinations. In that case you will have to put frame4j.jar as installed extension into the JRE used by the browser's Java-plug-in.

Hint 2: You may run this class as Applet by http://www.a-weinert.de/frame4j/downloads/compldemo.html.


© Copyright 1999 - 2002, 2005 Albrecht Weinert

Version:

11 (1.02.2010)

Author:

Albrecht Weinert

See Also:

Complex, CFun, Beans, Serialized Form

Nested Class Summary

class

ComplDemo.ComplexWrapper Wrapper for Complex with pixel coordinates and comparison.

Nested classes/interfaces inherited from class java.applet.Applet

Applet.AccessibleApplet

Nested classes/interfaces inherited from class java.awt.Panel

Panel.AccessibleAWTPanel

Nested classes/interfaces inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

static String	AUTHOR Information: author.
static String	CLASS_F Information: class file name.
static String	COPYRIGHT Information: copyright hint.
static int	LAST_OP Last operator respectively function index.
static String[][]	PAR_INFO Infos on Applet parameters.
boolean	showPi A circle of radius pi will be shown.
boolean	showUnit A circle of radius 1 will be shown.
static String	TITLE Title for use as graphical application.
static String	VERSION Informations: version and date.

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

ComplDemo()

Method Summary

void	actionPerformed(ActionEvent e)
void	componentHidden(ComponentEvent e)
void	componentMoved(ComponentEvent e)
void	componentResized(ComponentEvent e) Resize the frame if run as application.
void	componentShown(ComponentEvent e)
void	destroy() Final death as Applet.
String	getAppletInfo() Common informations on the Applet.
Dimension	getMinimumSize() Minimal size.
String[][]	getParameterInfo() Infos on Applet parameters.
Dimension	getPreferredSize() Size preferred.
void	imgInit() Initialising the background picture.
void	init() One time initialisations.
void	initOps() Set the operands to visible default values.
void	itemStateChanged(ItemEvent e) Item event.
static void	main(String[] args) Start the graphical Demo as Java application.
void	makeArith() Do the arithmetic operation.
void	mouseClicked(MouseEvent e)
void	mouseDragged(MouseEvent e) Dragging the mouse.
void	mouseEntered(MouseEvent e)
void	mouseExited(MouseEvent e)
void	mouseMoved(MouseEvent e)
void	mousePressed(MouseEvent e) Pressing the mouse button.
void	mouseReleased(MouseEvent e)
void	paint(Graphics g) Pint the picture.
void	run() Working method of the background thread.
void	selectOp(int ts) Choosing another arithmetic operation.
void	showArith() Display "op1 op op2 = erg".
void	update(Graphics g) Paints itself (avoiding flicker).
void	updateOps() Make the operands and result consistent (pixel to Complex).

Methods inherited from class java.applet.Applet

getAccessibleContext, getAppletContext, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

TITLE

public static final String TITLE

Title for use as graphical application.

See Also:

Constant Field Values

AUTHOR

public static final String AUTHOR

Information: author.

See Also:

Constant Field Values

CLASS_F

public static final String CLASS_F

Information: class file name.

See Also:

Constant Field Values

VERSION

public static final String VERSION

Informations: version and date.

See Also:

Constant Field Values

COPYRIGHT

public static final String COPYRIGHT

Information: copyright hint.

See Also:

Constant Field Values

PAR_INFO

public static final String[][] PAR_INFO

Infos on Applet parameters.

LAST_OP

public static final int LAST_OP

Last operator respectively function index.

The operations are numbered from 1: + to 19: exp() .

See Also:

selectOp(int), Constant Field Values

showPi

public boolean showPi

A circle of radius pi will be shown.

default: true

showUnit

public boolean showUnit

A circle of radius 1 will be shown.

default: true

Constructor Detail

ComplDemo

public ComplDemo()

Method Detail

getParameterInfo

public String[][] getParameterInfo()

Infos on Applet parameters.

Overrides:

getParameterInfo in class Applet

getAppletInfo

public String getAppletInfo()

Common informations on the Applet.

Overrides:

getAppletInfo in class Applet

init

public void init()

One time initialisations.

Will be called once by the browser in the Applet life cycle or once by java.beans.Beans.instantiate() if run as Java application.

Overrides:

init in class Applet

See Also:

main(String[])

destroy

public void destroy()

Final death as Applet.

Overrides:

destroy in class Applet

run

public void run()

Working method of the background thread.

Specified by:

run in interface Runnable

imgInit

public void imgInit()

Initialising the background picture.

Hint: In run as application this method must be called conditionally on several spots.

Reasons:

1. java.beans.Beans.instantiate() cannot create a picture in (Applet.) init() (Why not, the heck?),
2. Running as an application allows dynamic resizing.

initOps

public void initOps()

Set the operands to visible default values.

op1 = (1, -1i)
op2 = (-1, -1i)

updateOps

public void updateOps()

Make the operands and result consistent (pixel to Complex).

This method makes the operands consistent after changes of the Complex or of the pixels. If the state is undefined a change of pixels is assumed for the operands.

update

public void update(Graphics g)

Paints itself (avoiding flicker).

Overrides:

update in class Container

paint

public void paint(Graphics g)

Pint the picture.

Overrides:

paint in class Container

mouseDragged

public void mouseDragged(MouseEvent e)

Dragging the mouse.

By dragging the mouse with left button pressed the caught operand's vector will be dragged and the painting, calculation and text display updated.

Specified by:

mouseDragged in interface MouseMotionListener

mousePressed

public void mousePressed(MouseEvent e)

Pressing the mouse button.

By pressing the (left) mouse button the operand nearer to the spot will be caught. (If an unary operation is selected, there is only one operand and hence no need to choose.)

Specified by:

mousePressed in interface MouseListener

See Also:

mouseDragged(java.awt.event.MouseEvent)

mouseMoved

public void mouseMoved(MouseEvent e)

Specified by:

mouseMoved in interface MouseMotionListener

mouseClicked

public void mouseClicked(MouseEvent e)

Specified by:

mouseClicked in interface MouseListener

mouseEntered

public void mouseEntered(MouseEvent e)

Specified by:

mouseEntered in interface MouseListener

mouseExited

public void mouseExited(MouseEvent e)

Specified by:

mouseExited in interface MouseListener

mouseReleased

public void mouseReleased(MouseEvent e)

Specified by:

mouseReleased in interface MouseListener

componentResized

public void componentResized(ComponentEvent e)

Resize the frame if run as application.

Specified by:

componentResized in interface ComponentListener

componentHidden

public void componentHidden(ComponentEvent e)

Specified by:

componentHidden in interface ComponentListener

componentMoved

public void componentMoved(ComponentEvent e)

Specified by:

componentMoved in interface ComponentListener

componentShown

public void componentShown(ComponentEvent e)

Specified by:

componentShown in interface ComponentListener

itemStateChanged

public void itemStateChanged(ItemEvent e)

Item event.

This leads to the choice of an (other) arithmetic operation by using selectOp(int).

Specified by:

itemStateChanged in interface ItemListener

selectOp

public void selectOp(int ts)

Choosing another arithmetic operation.

This method changes the arithmetic operation to be demonstrated. It might be called for demo Applets by buttons or by Java-Script.

For parameter values <= 0 nothing happens.

For parameter values > LAST_OP the operands will be initialised to default values by initOps().

For other values this applies:
1: +; 2: -; 3: *; 4: /; 5: exp; 6: re; 7: im 8: conj; 9: neg; 10: abs; 11: arg; 12: norm (abs*abs); 13: sin; 14: cos; 15: sinh; 16: cosh; 17: tan; 18: tanh; 19: log.

makeArith

public void makeArith()

Do the arithmetic operation.

showArith

public void showArith()

Display "op1 op op2 = erg".

actionPerformed

public void actionPerformed(ActionEvent e)

Specified by:

actionPerformed in interface ActionListener

getPreferredSize

public Dimension getPreferredSize()

Size preferred.

Returns (500, 328).

Overrides:

getPreferredSize in class Container

getMinimumSize

public Dimension getMinimumSize()

Minimal size.

Returns (480, 228).

Overrides:

getMinimumSize in class Container

main

public static void main(String[] args)

Start the graphical Demo as Java application.

The Applet ComplDemo will be embedded into a window of initial size 520 * 338.
The proceeding (recipe) is applicable for other Applets too.

Parameters:

args - not relevant