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JavaTM 2 Platform Std. Ed. v1.4.2

javax.swing
Class JCheckBox

java.lang.Object
  extended byjava.awt.Component
      extended byjava.awt.Container
          extended byjavax.swing.JComponent
              extended byjavax.swing.AbstractButton
                  extended byjavax.swing.JToggleButton
                      extended byjavax.swing.JCheckBox
All Implemented Interfaces:
Accessible, ImageObserver, ItemSelectable, MenuContainer, Serializable, SwingConstants

public class JCheckBox
extends JToggleButton
implements Accessible

An implementation of a check box -- an item that can be selected or deselected, and which displays its state to the user. By convention, any number of check boxes in a group can be selected. See How to Use Buttons, Check Boxes, and Radio Buttons in The Java Tutorial for examples and information on using check boxes.

For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the JCheckBox key assignments.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the java.beans package. Please see XMLEncoder.

See Also:
JRadioButton

Nested Class Summary
protected  class JCheckBox.AccessibleJCheckBox
          This class implements accessibility support for the JCheckBox class.
 
Nested classes inherited from class javax.swing.JToggleButton
JToggleButton.AccessibleJToggleButton, JToggleButton.ToggleButtonModel
 
Nested classes inherited from class javax.swing.AbstractButton
AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener
 
Nested classes inherited from class javax.swing.JComponent
JComponent.AccessibleJComponent
 
Nested classes inherited from class java.awt.Container
Container.AccessibleAWTContainer
 
Nested classes inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy
 
Field Summary
static String BORDER_PAINTED_FLAT_CHANGED_PROPERTY
          Identifies a change to the flat property.
 
Fields inherited from class javax.swing.AbstractButton
actionListener, BORDER_PAINTED_CHANGED_PROPERTY, changeEvent, changeListener, CONTENT_AREA_FILLED_CHANGED_PROPERTY, DISABLED_ICON_CHANGED_PROPERTY, DISABLED_SELECTED_ICON_CHANGED_PROPERTY, FOCUS_PAINTED_CHANGED_PROPERTY, HORIZONTAL_ALIGNMENT_CHANGED_PROPERTY, HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY, ICON_CHANGED_PROPERTY, itemListener, MARGIN_CHANGED_PROPERTY, MNEMONIC_CHANGED_PROPERTY, model, MODEL_CHANGED_PROPERTY, PRESSED_ICON_CHANGED_PROPERTY, ROLLOVER_ENABLED_CHANGED_PROPERTY, ROLLOVER_ICON_CHANGED_PROPERTY, ROLLOVER_SELECTED_ICON_CHANGED_PROPERTY, SELECTED_ICON_CHANGED_PROPERTY, TEXT_CHANGED_PROPERTY, VERTICAL_ALIGNMENT_CHANGED_PROPERTY, VERTICAL_TEXT_POSITION_CHANGED_PROPERTY
 
Fields inherited from class javax.swing.JComponent
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
 
Fields inherited from class java.awt.Component
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
 
Fields inherited from interface javax.swing.SwingConstants
BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST
 
Fields inherited from interface java.awt.image.ImageObserver
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
 
Constructor Summary
JCheckBox()
          Creates an initially unselected check box button with no text, no icon.
JCheckBox(Action a)
          Creates a check box where properties are taken from the Action supplied.
JCheckBox(Icon icon)
          Creates an initially unselected check box with an icon.
JCheckBox(Icon icon, boolean selected)
          Creates a check box with an icon and specifies whether or not it is initially selected.
JCheckBox(String text)
          Creates an initially unselected check box with text.
JCheckBox(String text, boolean selected)
          Creates a check box with text and specifies whether or not it is initially selected.
JCheckBox(String text, Icon icon)
          Creates an initially unselected check box with the specified text and icon.
JCheckBox(String text, Icon icon, boolean selected)
          Creates a check box with text and icon, and specifies whether or not it is initially selected.
 
Method Summary
protected  void configurePropertiesFromAction(Action a)
          Factory method which sets the ActionEvent source's properties according to values from the Action instance.
protected  PropertyChangeListener createActionPropertyChangeListener(Action a)
          Factory method which creates the PropertyChangeListener used to update the ActionEvent source as properties change on its Action instance.
 AccessibleContext getAccessibleContext()
          Gets the AccessibleContext associated with this JCheckBox.
 String getUIClassID()
          Returns a string that specifies the name of the L&F class that renders this component.
 boolean isBorderPaintedFlat()
          Gets the value of the borderPaintedFlat property.
protected  String paramString()
          Returns a string representation of this JCheckBox.
 void setBorderPaintedFlat(boolean b)
          Sets the borderPaintedFlat property, which gives a hint to the look and feel as to the appearance of the check box border.
 void updateUI()
          Resets the UI property to a value from the current look and feel.
 
Methods inherited from class javax.swing.AbstractButton
addActionListener, addChangeListener, addItemListener, checkHorizontalKey, checkVerticalKey, createActionListener, createChangeListener, createItemListener, doClick, doClick, fireActionPerformed, fireItemStateChanged, fireStateChanged, getAction, getActionCommand, getActionListeners, getChangeListeners, getDisabledIcon, getDisabledSelectedIcon, getDisplayedMnemonicIndex, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getIconTextGap, getItemListeners, getLabel, getMargin, getMnemonic, getModel, getMultiClickThreshhold, getPressedIcon, getRolloverIcon, getRolloverSelectedIcon, getSelectedIcon, getSelectedObjects, getText, getUI, getVerticalAlignment, getVerticalTextPosition, imageUpdate, init, isBorderPainted, isContentAreaFilled, isFocusPainted, isRolloverEnabled, isSelected, paintBorder, removeActionListener, removeChangeListener, removeItemListener, setAction, setActionCommand, setBorderPainted, setContentAreaFilled, setDisabledIcon, setDisabledSelectedIcon, setDisplayedMnemonicIndex, setEnabled, setFocusPainted, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabel, setMargin, setMnemonic, setMnemonic, setModel, setMultiClickThreshhold, setPressedIcon, setRolloverEnabled, setRolloverIcon, setRolloverSelectedIcon, setSelected, setSelectedIcon, setText, setUI, setVerticalAlignment, setVerticalTextPosition
 
Methods inherited from class javax.swing.JComponent
addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update
 
Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, 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, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, 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

BORDER_PAINTED_FLAT_CHANGED_PROPERTY

public static final String BORDER_PAINTED_FLAT_CHANGED_PROPERTY
Identifies a change to the flat property.

See Also:
Constant Field Values
Constructor Detail

JCheckBox

public JCheckBox()
Creates an initially unselected check box button with no text, no icon.


JCheckBox

public JCheckBox(Icon icon)
Creates an initially unselected check box with an icon.

Parameters:
icon - the Icon image to display

JCheckBox

public JCheckBox(Icon icon,
                 boolean selected)
Creates a check box with an icon and specifies whether or not it is initially selected.

Parameters:
icon - the Icon image to display
selected - a boolean value indicating the initial selection state. If true the check box is selected

JCheckBox

public JCheckBox(String text)
Creates an initially unselected check box with text.

Parameters:
text - the text of the check box.

JCheckBox

public JCheckBox(Action a)
Creates a check box where properties are taken from the Action supplied.

Since:
1.3

JCheckBox

public JCheckBox(String text,
                 boolean selected)
Creates a check box with text and specifies whether or not it is initially selected.

Parameters:
text - the text of the check box.
selected - a boolean value indicating the initial selection state. If true the check box is selected

JCheckBox

public JCheckBox(String text,
                 Icon icon)
Creates an initially unselected check box with the specified text and icon.

Parameters:
text - the text of the check box.
icon - the Icon image to display

JCheckBox

public JCheckBox(String text,
                 Icon icon,
                 boolean selected)
Creates a check box with text and icon, and specifies whether or not it is initially selected.

Parameters:
text - the text of the check box.
icon - the Icon image to display
selected - a boolean value indicating the initial selection state. If true the check box is selected
Method Detail

setBorderPaintedFlat

public void setBorderPaintedFlat(boolean b)
Sets the borderPaintedFlat property, which gives a hint to the look and feel as to the appearance of the check box border. This is usually set to true when a JCheckBox instance is used as a renderer in a component such as a JTable or JTree. The default value for the borderPaintedFlat property is false. This method fires a property changed event. Some look and feels might not implement flat borders; they will ignore this property.

Parameters:
b - true requests that the border be painted flat; false requests normal borders
See Also:
isBorderPaintedFlat()

isBorderPaintedFlat

public boolean isBorderPaintedFlat()
Gets the value of the borderPaintedFlat property.

Returns:
the value of the borderPaintedFlat property
See Also:
setBorderPaintedFlat(boolean)

updateUI

public void updateUI()
Resets the UI property to a value from the current look and feel.

Overrides:
updateUI in class JToggleButton
See Also:
JComponent.updateUI()

getUIClassID

public String getUIClassID()
Returns a string that specifies the name of the L&F class that renders this component.

Overrides:
getUIClassID in class JToggleButton
Returns:
the string "CheckBoxUI"
See Also:
JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

configurePropertiesFromAction

protected void configurePropertiesFromAction(Action a)
Factory method which sets the ActionEvent source's properties according to values from the Action instance. The properties which are set may differ for subclasses. By default, the properties which get set are Text, Mnemonic, Enabled, ActionCommand, and ToolTipText.

Overrides:
configurePropertiesFromAction in class AbstractButton
Parameters:
a - the Action from which to get the properties, or null
Since:
1.3
See Also:
Action, AbstractButton.setAction(javax.swing.Action)

createActionPropertyChangeListener

protected PropertyChangeListener createActionPropertyChangeListener(Action a)
Factory method which creates the PropertyChangeListener used to update the ActionEvent source as properties change on its Action instance. Subclasses may override this in order to provide their own PropertyChangeListener if the set of properties which should be kept up to date differs from the default properties (Text, Icon, Enabled, ToolTipText). Note that PropertyChangeListeners should avoid holding strong references to the ActionEvent source, as this may hinder garbage collection of the ActionEvent source and all components in its containment hierarchy.

Overrides:
createActionPropertyChangeListener in class AbstractButton
Parameters:
a - the new action for the button
Since:
1.3
See Also:
Action, AbstractButton.setAction(javax.swing.Action)

paramString

protected String paramString()
Returns a string representation of this JCheckBox. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null. specific new aspects of the JFC components.

Overrides:
paramString in class JToggleButton
Returns:
a string representation of this JCheckBox.

getAccessibleContext

public AccessibleContext getAccessibleContext()
Gets the AccessibleContext associated with this JCheckBox. For JCheckBoxes, the AccessibleContext takes the form of an AccessibleJCheckBox. A new AccessibleJCheckBox instance is created if necessary.

Specified by:
getAccessibleContext in interface Accessible
Overrides:
getAccessibleContext in class JToggleButton
Returns:
an AccessibleJCheckBox that serves as the AccessibleContext of this JCheckBox

Copyright 2003 Sun Microsystems, Inc. All rights reserved