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JRadioButton (Java Platform SE 6)


















    






    

    



    
  
    
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javax.swing

    
Class JRadioButton
    

    java.lang.Object
  extended by java.awt.Component
      extended by java.awt.Container
          extended by javax.swing.JComponent
              extended by javax.swing.AbstractButton
                  extended by javax.swing.JToggleButton
                      extended by javax.swing.JRadioButton

    

    

    All Implemented Interfaces: 
    ImageObserver, ItemSelectable, MenuContainer, Serializable, Accessible, SwingConstants
    

    

    

    

    public class JRadioButton
    extends JToggleButton
    implements Accessible

    An implementation of a radio button -- an item that can be selected or deselected, and which displays its state to the user. Used with a ButtonGroup object to create a group of buttons in which only one button at a time can be selected. (Create a ButtonGroup object and use its add method to include the JRadioButton objects in the group.)

    Note: The ButtonGroup object is a logical grouping -- not a physical grouping. Tocreate a button panel, you should still create a JPanel or similar container-object and add a Border to it to set it off from surrounding components.

    Buttons can be configured, and to some degree controlled, by Actions. Using an Action with a button has many benefits beyond directly configuring a button. Refer to Swing Components Supporting Action for more details, and you can find more information in How to Use Actions, a section in The Java Tutorial.

    See How to Use Buttons, Check Boxes, and Radio Buttons in The Java Tutorial for further documentation.

    Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

    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:
    ButtonGroup, JCheckBox

    Nested Class Summary
    protected  class JRadioButton.AccessibleJRadioButton
              This class implements accessibility support for the JRadioButton class.
     
    Nested classes/interfaces inherited from class javax.swing.JToggleButton
    JToggleButton.AccessibleJToggleButton, JToggleButton.ToggleButtonModel
     
    Nested classes/interfaces inherited from class javax.swing.AbstractButton
    AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener
     
    Nested classes/interfaces inherited from class javax.swing.JComponent
    JComponent.AccessibleJComponent
     
    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
     
    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
    JRadioButton()
              Creates an initially unselected radio button with no set text.
    JRadioButton(Action a)
              Creates a radiobutton where properties are taken from the Action supplied.
    JRadioButton(Icon icon)
              Creates an initially unselected radio button with the specified image but no text.
    JRadioButton(Icon icon, boolean selected)
              Creates a radio button with the specified image and selection state, but no text.
    JRadioButton(String text)
              Creates an unselected radio button with the specified text.
    JRadioButton(String text, boolean selected)
              Creates a radio button with the specified text and selection state.
    JRadioButton(String text, Icon icon)
              Creates a radio button that has the specified text and image, and that is initially unselected.
    JRadioButton(String text, Icon icon, boolean selected)
              Creates a radio button that has the specified text, image, and selection state.
     
    Method Summary
     AccessibleContext getAccessibleContext()
              Gets the AccessibleContext associated with this JRadioButton.
     String getUIClassID()
              Returns the name of the L&F class that renders this component.
    protected  String paramString()
              Returns a string representation of this JRadioButton.
     void updateUI()
              Resets the UI property to a value from the current look and feel.
     
    Methods inherited from class javax.swing.AbstractButton
    actionPropertyChanged, addActionListener, addChangeListener, addImpl, addItemListener, checkHorizontalKey, checkVerticalKey, configurePropertiesFromAction, createActionListener, createActionPropertyChangeListener, createChangeListener, createItemListener, doClick, doClick, fireActionPerformed, fireItemStateChanged, fireStateChanged, getAction, getActionCommand, getActionListeners, getChangeListeners, getDisabledIcon, getDisabledSelectedIcon, getDisplayedMnemonicIndex, getHideActionText, 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, removeNotify, setAction, setActionCommand, setBorderPainted, setContentAreaFilled, setDisabledIcon, setDisabledSelectedIcon, setDisplayedMnemonicIndex, setEnabled, setFocusPainted, setHideActionText, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabel, setLayout, setMargin, setMnemonic, setMnemonic, setModel, setMultiClickThreshhold, setPressedIcon, setRolloverEnabled, setRolloverIcon, setRolloverSelectedIcon, setSelected, setSelectedIcon, setText, setUI, setVerticalAlignment, setVerticalTextPosition
     
    Methods inherited from class javax.swing.JComponent
    addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, 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, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, 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, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, 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, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, 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
     

    Constructor Detail

    JRadioButton

    public JRadioButton()
    Creates an initially unselected radio button with no set text.

    JRadioButton

    public JRadioButton(Icon icon)
    Creates an initially unselected radio button with the specified image but no text.

    Parameters:
    icon - the image that the button should display

    JRadioButton

    public JRadioButton(Action a)
    Creates a radiobutton where properties are taken from the Action supplied.

    Since:
    1.3

    JRadioButton

    public JRadioButton(Icon icon,
                    boolean selected)
    Creates a radio button with the specified image and selection state, but no text.

    Parameters:
    icon - the image that the button should display
    selected - if true, the button is initially selected; otherwise, the button is initially unselected

    JRadioButton

    public JRadioButton(String text)
    Creates an unselected radio button with the specified text.

    Parameters:
    text - the string displayed on the radio button

    JRadioButton

    public JRadioButton(String text,
                    boolean selected)
    Creates a radio button with the specified text and selection state.

    Parameters:
    text - the string displayed on the radio button
    selected - if true, the button is initially selected; otherwise, the button is initially unselected

    JRadioButton

    public JRadioButton(String text,
                    Icon icon)
    Creates a radio button that has the specified text and image, and that is initially unselected.

    Parameters:
    text - the string displayed on the radio button
    icon - the image that the button should display

    JRadioButton

    public JRadioButton(String text,
                    Icon icon,
                    boolean selected)
    Creates a radio button that has the specified text, image, and selection state.

    Parameters:
    text - the string displayed on the radio button
    icon - the image that the button should display
    Method Detail

    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 the name of the L&F class that renders this component.

    Overrides:
    getUIClassID in class JToggleButton
    Returns:
    String "RadioButtonUI"
    See Also:
    JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

    paramString

    protected String paramString()
    Returns a string representation of this JRadioButton. 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.

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

    getAccessibleContext

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

    Specified by:
    getAccessibleContext in interface Accessible
    Overrides:
    getAccessibleContext in class JToggleButton
    Returns:
    an AccessibleJRadioButton that serves as the AccessibleContext of this JRadioButton
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    For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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