JavaTM 2 Platform
Std. Ed. v1.3.1

javax.swing
Class JCheckBoxMenuItem

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.AbstractButton
                          |
                          +--javax.swing.JMenuItem
                                |
                                +--javax.swing.JCheckBoxMenuItem
All Implemented Interfaces:
Accessible, ImageObserver, ItemSelectable, MenuContainer, MenuElement, Serializable, SwingConstants

public class JCheckBoxMenuItem
extends JMenuItem
implements SwingConstants, Accessible

A menu item that can be selected or deselected. If selected, the menu item typically appears with a checkmark next to it. If unselected or deselected, the menu item appears without a checkmark. Like a regular menu item, a check box menu item can have either text or a graphic icon associated with it, or both.

Either isSelected/setSelected or getState/setState can be used to determine/specify the menu item's selection state. The preferred methods are isSelected and setSelected, which work for all menus and buttons. The getState and setState methods exist for compatibility with other component sets.

For further information and examples of using check box menu items, see How to Use Menus, a section in The Java Tutorial. For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the JCheckBoxMenuItem 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. A future release of Swing will provide support for long term persistence.

See Also:
Serialized Form

Inner Class Summary
protected  class JCheckBoxMenuItem.AccessibleJCheckBoxMenuItem
          This class implements accessibility support for the JCheckBoxMenuItem class.
 
Inner classes inherited from class javax.swing.JMenuItem
JMenuItem.AccessibleJMenuItem
 
Inner classes inherited from class javax.swing.AbstractButton
AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener
 
Inner classes inherited from class javax.swing.JComponent
JComponent.AccessibleJComponent
 
Inner classes inherited from class java.awt.Container
Container.AccessibleAWTContainer
 
Inner classes inherited from class java.awt.Component
Component.AccessibleAWTComponent
 
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, NORTH, NORTH_EAST, NORTH_WEST, 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
JCheckBoxMenuItem()
          Creates an initially unselected check box menu item with no set text or icon.
JCheckBoxMenuItem(Action a)
          Creates a menu item whose properties are taken from the Action supplied.
JCheckBoxMenuItem(Icon icon)
          Creates an initially unselected check box menu item with an icon.
JCheckBoxMenuItem(String text)
          Creates an initially unselected check box menu item with text.
JCheckBoxMenuItem(String text, boolean b)
          Creates a check box menu item with the specified text and selection state.
JCheckBoxMenuItem(String text, Icon icon)
          Creates an initially unselected check box menu item with the specified text and icon.
JCheckBoxMenuItem(String text, Icon icon, boolean b)
          Creates a check box menu item with the specified text, icon, and selection state.
 
Method Summary
 AccessibleContext getAccessibleContext()
          Gets the AccessibleContext associated with this JCheckBoxMenuItem.
 Object[] getSelectedObjects()
          Returns an array (length 1) containing the check box menu item label or null if the check box is not selected.
 boolean getState()
          Returns the selected-state of the item.
 String getUIClassID()
          Returns the name of the L&F class that renders this component.
protected  String paramString()
          Returns a string representation of this JCheckBoxMenuItem.
 void requestFocus()
          Override JComponent.requestFocus() to prevent grabbing the focus.
 void setState(boolean b)
          Sets the selected-state of the item.
 
Methods inherited from class javax.swing.JMenuItem
addMenuDragMouseListener, addMenuKeyListener, configurePropertiesFromAction, createActionPropertyChangeListener, fireMenuDragMouseDragged, fireMenuDragMouseEntered, fireMenuDragMouseExited, fireMenuDragMouseReleased, fireMenuKeyPressed, fireMenuKeyReleased, fireMenuKeyTyped, getAccelerator, getComponent, getSubElements, init, isArmed, menuSelectionChanged, processKeyEvent, processMenuDragMouseEvent, processMenuKeyEvent, processMouseEvent, removeMenuDragMouseListener, removeMenuKeyListener, setAccelerator, setArmed, setEnabled, setUI, updateUI
 
Methods inherited from class javax.swing.AbstractButton
addActionListener, addChangeListener, addItemListener, checkHorizontalKey, checkVerticalKey, createActionListener, createChangeListener, createItemListener, doClick, doClick, fireActionPerformed, fireItemStateChanged, fireStateChanged, getAction, getActionCommand, getDisabledIcon, getDisabledSelectedIcon, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getLabel, getMargin, getMnemonic, getModel, getPressedIcon, getRolloverIcon, getRolloverSelectedIcon, getSelectedIcon, getText, getUI, getVerticalAlignment, getVerticalTextPosition, imageUpdate, isBorderPainted, isContentAreaFilled, isFocusPainted, isFocusTraversable, isRolloverEnabled, isSelected, paintBorder, removeActionListener, removeChangeListener, removeItemListener, setAction, setActionCommand, setBorderPainted, setContentAreaFilled, setDisabledIcon, setDisabledSelectedIcon, setFocusPainted, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setLabel, setMargin, setMnemonic, setMnemonic, setModel, 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, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getVerifyInputWhenFocusTarget, getVisibleRect, getWidth, getX, getY, grabFocus, hasFocus, hide, isDoubleBuffered, isFocusCycleRoot, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processFocusEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDoubleBuffered, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update
 
Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getLayout, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setLayout, validate, validateTree
 
Methods inherited from class java.awt.Component
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, inside, isDisplayable, isEnabled, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

JCheckBoxMenuItem

public JCheckBoxMenuItem()
Creates an initially unselected check box menu item with no set text or icon.

JCheckBoxMenuItem

public JCheckBoxMenuItem(Icon icon)
Creates an initially unselected check box menu item with an icon.
Parameters:
icon - the icon of the CheckBoxMenuItem.

JCheckBoxMenuItem

public JCheckBoxMenuItem(String text)
Creates an initially unselected check box menu item with text.
Parameters:
text - the text of the CheckBoxMenuItem

JCheckBoxMenuItem

public JCheckBoxMenuItem(Action a)
Creates a menu item whose properties are taken from the Action supplied.
Since:
1.3

JCheckBoxMenuItem

public JCheckBoxMenuItem(String text,
                         Icon icon)
Creates an initially unselected check box menu item with the specified text and icon.
Parameters:
text - the text of the CheckBoxMenuItem
icon - the icon of the CheckBoxMenuItem

JCheckBoxMenuItem

public JCheckBoxMenuItem(String text,
                         boolean b)
Creates a check box menu item with the specified text and selection state.
Parameters:
text - the text of the check box menu item.
b - the selected state of the check box menu item

JCheckBoxMenuItem

public JCheckBoxMenuItem(String text,
                         Icon icon,
                         boolean b)
Creates a check box menu item with the specified text, icon, and selection state.
Parameters:
text - the text of the check box menu item
icon - the icon of the check box menu item
b - the selected state of the check box menu item
Method Detail

getUIClassID

public String getUIClassID()
Returns the name of the L&F class that renders this component.
Overrides:
getUIClassID in class JMenuItem
Returns:
"CheckBoxMenuItemUI"
See Also:
JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

getState

public boolean getState()
Returns the selected-state of the item. This method exists for AWT compatibility only. New code should use isSelected() instead.
Returns:
true if the item is selected

setState

public void setState(boolean b)
Sets the selected-state of the item. This method exists for AWT compatibility only. New code should use setSelected() instead.
Parameters:
b - a boolean value indicating the item's selected-state, where true=selected

getSelectedObjects

public Object[] getSelectedObjects()
Returns an array (length 1) containing the check box menu item label or null if the check box is not selected.
Overrides:
getSelectedObjects in class AbstractButton
Returns:
an array containing one Object -- the text of the menu item -- if the item is selected; otherwise null

requestFocus

public void requestFocus()
Override JComponent.requestFocus() to prevent grabbing the focus.
Overrides:
requestFocus in class JComponent
Following copied from class: java.awt.Component
See Also:
FocusEvent, Component.addFocusListener(java.awt.event.FocusListener), Component.processFocusEvent(java.awt.event.FocusEvent), Component.isFocusTraversable()

paramString

protected String paramString()
Returns a string representation of this JCheckBoxMenuItem. 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 JMenuItem
Returns:
a string representation of this JCheckBoxMenuItem.

getAccessibleContext

public AccessibleContext getAccessibleContext()
Gets the AccessibleContext associated with this JCheckBoxMenuItem. For JCheckBoxMenuItems, the AccessibleContext takes the form of an AccessibleJCheckBoxMenuItem. A new AccessibleJCheckBoxMenuItem instance is created if necessary.
Specified by:
getAccessibleContext in interface Accessible
Overrides:
getAccessibleContext in class JMenuItem
Returns:
an AccessibleJCheckBoxMenuItem that serves as the AccessibleContext of this AccessibleJCheckBoxMenuItem

JavaTM 2 Platform
Std. Ed. v1.3.1

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For further API reference and developer documentation, see Java 2 SDK 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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