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javax.swing
Class JMenuBar
java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JMenuBar
-
All Implemented Interfaces:
-
ImageObserver
,
MenuContainer
,
Serializable
,
Accessible
,
MenuElement
-
Direct Known Subclasses:
-
BasicInternalFrameTitlePane.SystemMenuBar
-
public class JMenuBar
- extends JComponent
- implements Accessible, MenuElement
An implementation of a menu bar. You add JMenu objects to the menu bar to construct a menu. When the user selects a JMenu object, its associated JPopupMenu is displayed, allowing the user to select one of the JMenuItems on it.
For information and examples of using menu bars see
How to Use Menus
, a section in The Java Tutorial.
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 JavaBeans
TM
has been added to the java.beans package. Please see
XMLEncoder
.
-
See Also:
-
JMenu
,
JPopupMenu
,
JMenuItem
Constructor Summary
|
JMenuBar
()
Creates a new menu bar. |
Methods inherited from class javax.swing.
JComponent
|
addAncestorListener
,
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
,
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
,
setEnabled
,
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
,
addImpl
,
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
,
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
,
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
,
imageUpdate
,
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
|
JMenuBar
public JMenuBar()
-
Creates a new menu bar.
getUI
public MenuBarUI getUI()
-
Returns the menubar's current UI.
-
-
-
See Also:
-
setUI(javax.swing.plaf.MenuBarUI)
setUI
public void setUI(MenuBarUI ui)
-
Sets the L&F object that renders this component.
-
-
-
Parameters:
-
ui - the new MenuBarUI L&F object
-
See Also:
-
UIDefaults.getUI(javax.swing.JComponent)
updateUI
public void updateUI()
-
Resets the UI property with a value from the current look and feel.
-
-
Overrides:
-
updateUI
in class
JComponent
-
-
See Also:
-
JComponent.updateUI()
getUIClassID
public String getUIClassID()
-
Returns the name of the L&F class that renders this component.
-
-
Overrides:
-
getUIClassID
in class
JComponent
-
-
Returns:
-
the string "MenuBarUI"
-
See Also:
-
JComponent.getUIClassID()
,
UIDefaults.getUI(javax.swing.JComponent)
getSelectionModel
public SingleSelectionModel getSelectionModel()
-
Returns the model object that handles single selections.
-
-
-
Returns:
-
the SingleSelectionModel property
-
See Also:
-
SingleSelectionModel
setSelectionModel
public void setSelectionModel(SingleSelectionModel model)
-
Sets the model object to handle single selections.
-
-
-
Parameters:
-
model - the SingleSelectionModel to use
-
See Also:
-
SingleSelectionModel
add
public JMenu add(JMenu c)
-
Appends the specified menu to the end of the menu bar.
-
-
-
Parameters:
-
c - the JMenu component to add
-
Returns:
-
the menu component
getMenu
public JMenu getMenu(int index)
-
Returns the menu at the specified position in the menu bar.
-
-
-
Parameters:
-
index - an integer giving the position in the menu bar, where 0 is the first position
-
Returns:
-
the JMenu at that position, or null if if there is no JMenu at that position (ie. if it is a JMenuItem)
getMenuCount
public int getMenuCount()
-
Returns the number of items in the menu bar.
-
-
-
Returns:
-
the number of items in the menu bar
setHelpMenu
public void setHelpMenu(JMenu menu)
-
Sets the help menu that appears when the user selects the "help" option in the menu bar. This method is not yet implemented and will throw an exception.
-
-
-
Parameters:
-
menu - the JMenu that delivers help to the user
getHelpMenu
public JMenu getHelpMenu()
-
Gets the help menu for the menu bar. This method is not yet implemented and will throw an exception.
-
-
-
Returns:
-
the JMenu that delivers help to the user
getComponentAtIndex
@Deprecated
public Component getComponentAtIndex(int i)
-
Deprecated.
replaced by getComponent(int i)
-
Returns the component at the specified index.
-
-
-
Parameters:
-
i - an integer specifying the position, where 0 is first
-
Returns:
-
the Component at the position, or null for an invalid index
getComponentIndex
public int getComponentIndex(Component c)
-
Returns the index of the specified component.
-
-
-
Parameters:
-
c - the Component to find
-
Returns:
-
an integer giving the component's position, where 0 is first; or -1 if it can't be found
setSelected
public void setSelected(Component sel)
-
Sets the currently selected component, producing a a change to the selection model.
-
-
-
Parameters:
-
sel - the Component to select
isSelected
public boolean isSelected()
-
Returns true if the menu bar currently has a component selected.
-
-
-
Returns:
-
true if a selection has been made, else false
isBorderPainted
public boolean isBorderPainted()
-
Returns true if the menu bars border should be painted.
-
-
-
Returns:
-
true if the border should be painted, else false
setBorderPainted
public void setBorderPainted(boolean b)
-
Sets whether the border should be painted.
-
-
-
Parameters:
-
b - if true and border property is not null, the border is painted.
-
See Also:
-
isBorderPainted()
paintBorder
protected void paintBorder(Graphics g)
-
Paints the menubar's border if BorderPainted property is true.
-
-
Overrides:
-
paintBorder
in class
JComponent
-
-
Parameters:
-
g - the Graphics context to use for painting
-
See Also:
-
JComponent.paint(java.awt.Graphics)
,
JComponent.setBorder(javax.swing.border.Border)
setMargin
public void setMargin(Insets m)
-
Sets the margin between the menubar's border and its menus. Setting to null will cause the menubar to use the default margins.
-
-
-
Parameters:
-
m - an Insets object containing the margin values
-
See Also:
-
Insets
getMargin
public Insets getMargin()
-
Returns the margin between the menubar's border and its menus. If there is no previous margin, it will create a default margin with zero size.
-
-
-
Returns:
-
an Insets object containing the margin values
-
See Also:
-
Insets
processMouseEvent
public void processMouseEvent(MouseEvent event,
MenuElement[] path,
MenuSelectionManager manager)
-
Implemented to be a MenuElement -- does nothing.
-
-
Specified by:
-
processMouseEvent
in interface
MenuElement
-
-
See Also:
-
getSubElements()
processKeyEvent
public void processKeyEvent(KeyEvent e,
MenuElement[] path,
MenuSelectionManager manager)
-
Implemented to be a MenuElement -- does nothing.
-
-
Specified by:
-
processKeyEvent
in interface
MenuElement
-
-
See Also:
-
getSubElements()
menuSelectionChanged
public void menuSelectionChanged(boolean isIncluded)
-
Implemented to be a MenuElement -- does nothing.
-
-
Specified by:
-
menuSelectionChanged
in interface
MenuElement
-
-
See Also:
-
getSubElements()
getSubElements
public MenuElement[] getSubElements()
-
Implemented to be a MenuElement -- returns the menus in this menu bar. This is the reason for implementing the MenuElement interface -- so that the menu bar can be treated the same as other menu elements.
-
-
Specified by:
-
getSubElements
in interface
MenuElement
-
-
Returns:
-
an array of menu items in the menu bar.
getComponent
public Component getComponent()
-
Implemented to be a MenuElement. Returns this object.
-
-
Specified by:
-
getComponent
in interface
MenuElement
-
-
Returns:
-
the current Component (this)
-
See Also:
-
getSubElements()
paramString
protected String paramString()
-
Returns a string representation of this JMenuBar. 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
JComponent
-
-
Returns:
-
a string representation of this JMenuBar
getAccessibleContext
public AccessibleContext getAccessibleContext()
-
Gets the AccessibleContext associated with this JMenuBar. For JMenuBars, the AccessibleContext takes the form of an AccessibleJMenuBar. A new AccessibleJMenuBar instance is created if necessary.
-
-
Specified by:
-
getAccessibleContext
in interface
Accessible
-
Overrides:
-
getAccessibleContext
in class
JComponent
-
-
Returns:
-
an AccessibleJMenuBar that serves as the AccessibleContext of this JMenuBar
processKeyBinding
protected boolean processKeyBinding(KeyStroke ks,
KeyEvent e,
int condition,
boolean pressed)
-
Subclassed to check all the child menus.
-
-
Overrides:
-
processKeyBinding
in class
JComponent
-
-
Parameters:
-
ks - the KeyStroke queried
-
e - the KeyEvent
-
condition - one of the following values:
-
JComponent.WHEN_FOCUSED
-
JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT
-
JComponent.WHEN_IN_FOCUSED_WINDOW
-
pressed - true if the key is pressed
-
Returns:
-
true if there was a binding to an action, and the action was enabled
-
Since:
-
1.3
addNotify
public void addNotify()
-
Overrides JComponent.addNotify to register this menu bar with the current keyboard manager.
-
-
Overrides:
-
addNotify
in class
JComponent
-
-
See Also:
-
JComponent.registerKeyboardAction(java.awt.event.ActionListener, java.lang.String, javax.swing.KeyStroke, int)
removeNotify
public void removeNotify()
-
Overrides JComponent.removeNotify to unregister this menu bar with the current keyboard manager.
-
-
Overrides:
-
removeNotify
in class
JComponent
-
-
See Also:
-
JComponent.registerKeyboardAction(java.awt.event.ActionListener, java.lang.String, javax.swing.KeyStroke, int)