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javax.swing
Class JButton
java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.AbstractButton
javax.swing.JButton
-
All Implemented Interfaces:
-
ImageObserver
,
ItemSelectable
,
MenuContainer
,
Serializable
,
Accessible
,
SwingConstants
-
Direct Known Subclasses:
-
BasicArrowButton
,
MetalComboBoxButton
-
public class JButton
- extends AbstractButton
- implements Accessible
An implementation of a "push" button.
An implementation of a "push" button. See
How to Use Buttons, Check Boxes, and Radio Buttons
in The Java Tutorial for information and examples of using buttons.
Buttons can be configured, and to some degree controlled, by
Action
s. 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 information and examples of using buttons.
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
.
Nested Class Summary
|
protected class |
JButton.AccessibleJButton
This class implements accessibility support for the JButton class. |
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
|
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 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
|
JButton
()
Creates a button with no set text or icon. |
JButton
(
Action
a)
Creates a button where properties are taken from the Action supplied. |
JButton
(
Icon
icon)
Creates a button with an icon. |
JButton
(
String
text)
Creates a button with text. |
JButton
(
String
text,
Icon
icon)
Creates a button with initial text and an icon. |
Method Summary
|
protected void
|
configurePropertiesFromAction
(
Action
Factory method which sets the AbstractButton's properties according to values from the Action instance.
|
AccessibleContext
|
getAccessibleContext
()
Gets the AccessibleContext associated with this JButton. |
String
|
getUIClassID
()
Returns a string that specifies the name of the L&F class that renders this component. |
boolean |
isDefaultButton
()
Gets the value of the defaultButton property, which if true means that this button is the current default button for its JRootPane. |
boolean |
isDefaultCapable
()
Gets the value of the defaultCapable property. |
protected
String
|
paramString
()
Returns a string representation of this JButton. |
void |
removeNotify
()
Overrides JComponent.removeNotify to check if this button is currently set as the default button on the RootPane, and if so, sets the RootPane's default button to null to ensure the RootPane doesn't hold onto an invalid button reference. |
void |
setDefaultCapable
(boolean defaultCapable)
Sets the defaultCapable property, which determines whether this button can be made the default button for its root pane. |
void |
updateUI
()
Resets the UI property to a value from the current look and feel. |
Methods inherited from class javax.swing.
AbstractButton
|
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
,
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
|
JButton
public JButton()
-
Creates a button with no set text or icon.
JButton
public JButton(Icon icon)
-
Creates a button with an icon.
-
Parameters:
-
icon - the Icon image to display on the button
JButton
public JButton(String text)
-
Creates a button with text.
-
Parameters:
-
text - the text of the button
JButton
public JButton(Action a)
-
Creates a button where properties are taken from the Action supplied.
-
Parameters:
-
a - the Action used to specify the new button
-
Since:
-
1.3
JButton
public JButton(String text,
Icon icon)
-
Creates a button with initial text and an icon.
-
Parameters:
-
text - the text of the button
-
icon - the Icon image to display on the button
updateUI
public void updateUI()
-
Resets the UI property to a value from the current look and feel.
-
-
Overrides:
-
updateUI
in class
AbstractButton
-
-
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
JComponent
-
-
Returns:
-
the string "ButtonUI"
-
See Also:
-
JComponent.getUIClassID()
,
UIDefaults.getUI(javax.swing.JComponent)
isDefaultButton
public boolean isDefaultButton()
-
Gets the value of the defaultButton property, which if true means that this button is the current default button for its JRootPane. Most look and feels render the default button differently, and may potentially provide bindings to access the default button.
-
-
-
Returns:
-
the value of the defaultButton property
-
See Also:
-
JRootPane.setDefaultButton(javax.swing.JButton)
,
isDefaultCapable()
isDefaultCapable
public boolean isDefaultCapable()
-
Gets the value of the defaultCapable property.
-
-
-
Returns:
-
the value of the defaultCapable property
-
See Also:
-
setDefaultCapable(boolean)
,
isDefaultButton()
,
JRootPane.setDefaultButton(javax.swing.JButton)
setDefaultCapable
public void setDefaultCapable(boolean defaultCapable)
-
Sets the defaultCapable property, which determines whether this button can be made the default button for its root pane. The default value of the defaultCapable property is true unless otherwise specified by the look and feel.
-
-
-
Parameters:
-
defaultCapable - true if this button will be capable of being the default button on the RootPane; otherwise false
-
See Also:
-
isDefaultCapable()
removeNotify
public void removeNotify()
-
Overrides JComponent.removeNotify to check if this button is currently set as the default button on the RootPane, and if so, sets the RootPane's default button to null to ensure the RootPane doesn't hold onto an invalid button reference.
-
-
Overrides:
-
removeNotify
removeNotify
in class
AbstractButton
JComponent
-
-
See Also:
-
JComponent.registerKeyboardAction(java.awt.event.ActionListener, java.lang.String, javax.swing.KeyStroke, int)
configurePropertiesFromAction
protected void configurePropertiesFromAction ( Action a)
-
Factory method which sets the AbstractButton's properties according to values from the Action instance. The properties which get set may differ for AbstractButton subclasses. By default, the properties which get set are Text, Icon, Enabled, ToolTipText, ActionCommand, and Mnemonic.
-
-
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)
paramString
protected String paramString()
-
Returns a string representation of this JButton. 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
AbstractButton
-
-
Returns:
-
a string representation of this JButton
getAccessibleContext
public AccessibleContext getAccessibleContext()
-
Gets the AccessibleContext associated with this JButton. For JButtons, the AccessibleContext takes the form of an AccessibleJButton. A new AccessibleJButton instance is created if necessary.
-
-
Specified by:
-
getAccessibleContext
in interface
Accessible
-
Overrides:
-
getAccessibleContext
in class
JComponent
-
-
Returns:
-
an AccessibleJButton that serves as the AccessibleContext of this JButton