Class Evaluator
- java.lang.Object
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- java.awt.Component
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- java.awt.Container
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- java.awt.Panel
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- java.applet.Applet
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- Evaluator
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- All Implemented Interfaces:
java.awt.event.ActionListener
,java.awt.image.ImageObserver
,java.awt.MenuContainer
,java.io.Serializable
,java.util.EventListener
,javax.accessibility.Accessible
public class Evaluator extends java.applet.Applet implements java.awt.event.ActionListener
An Evaluator applet lets the user enter the values of one or more variables, and it displayes the values of one or more expressions that can involve those variables. The expression values are updated continuously as the user types.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description Evaluator()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
actionPerformed(java.awt.event.ActionEvent evt)
Respond when user clicks a button; not meant to be called directly.protected java.awt.Color
getColorParam(java.lang.String paramName, java.awt.Color defaultColor)
Get The value of an applet parameter that specifies a color.void
init()
The init() method is called by the system to set up the applet.JCMPanel
makeMainPanel()
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Methods inherited from class java.applet.Applet
destroy, getAccessibleContext, getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, isValidateRoot, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop
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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, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paint, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusDownCycle, update, validate, validateTree
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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, 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, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, requestFocusInWindow, reshape, revalidate, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setMixingCutoutShape, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle
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Method Detail
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init
public void init()
The init() method is called by the system to set up the applet. If the applet does not appear as a button, then init() creates the main panel of the applet and calls setUpMainPanel to set it up.- Overrides:
init
in classjava.applet.Applet
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makeMainPanel
public JCMPanel makeMainPanel()
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actionPerformed
public void actionPerformed(java.awt.event.ActionEvent evt)
Respond when user clicks a button; not meant to be called directly. This opens and closes the separate window.- Specified by:
actionPerformed
in interfacejava.awt.event.ActionListener
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getColorParam
protected java.awt.Color getColorParam(java.lang.String paramName, java.awt.Color defaultColor)
Get The value of an applet parameter that specifies a color. The color can be specfied as a list of three numbers in the range 0 to 255 or by one of the standard color names ("black", "red", "blue", "green", "yellow", "cyan", "magenta", "gray", "darkgray", "lightgray", "pink", "orange", "white"). Color names are not case sensitive.- Parameters:
paramName
- The name of the applet parameter.defaultColor
- The value to be returned if getParameter(paramName) is null or is not a valid color.
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