Class JRootPane

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JRootPane

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible

public class JRootPane
extends JComponent
implements Accessible

A lightweight container used behind the scenes by JFrame, JDialog, JWindow, and JInternalFrame. For task-oriented information on functionality provided by root panes see How to Use Root Panes, a section in The Java Tutorial.

The following image shows the relationships between the classes that use root panes.

The "heavyweight" components (those that delegate to a peer, or native component on the host system) are shown with a heavier box. AWT components in red, Swing heavyweights in blue. The three heavyweight JFC/Swing containers (JFrame, JDialog, and JWindow) are shown in relation to the AWT classes they extend. These three components are the only heavyweight containers in the Swing library. The lightweight container JInternalFrame is also shown in green with thin outline. All four of these JFC/Swing containers implement the RootPaneContainer interface, and they all delegate their operations to a JRootPane.

Note: The JComponent method getRootPane can be used to obtain the JRootPane that contains a given component.

Example:

The diagram at right shows the structure of a JRootPane. A JRootpane is made up of a glassPane, an optional menuBar, and a contentPane. (The JLayeredPane manages the menuBar and the contentPane.) The glassPane sits over the top of everything, where it is in a position to intercept mouse movements. Since the glassPane (like the contentPane) can be an arbitrary component, it is also possible to set up the glassPane for drawing. Lines and images on the glassPane can then range over the frames underneath without being limited by their boundaries.

Although the menuBar component is optional, the layeredPane, contentPane, and glassPane always exist. Attempting to set them to null generates an exception.

To add components to the JRootPane (other than the optional menu bar), you add the object to the contentPane of the JRootPane, like this:

      rootPane.getContentPane().add(child);

The same principle holds true for setting layout managers, removing components, listing children, etc. All these methods are invoked on the contentPane instead of on the JRootPane.

Note: The default layout manager for the contentPane is a BorderLayout manager. However, the JRootPane uses a custom LayoutManager. So, when you want to change the layout manager for the components you added to a JRootPane, be sure to use code like this:

   rootPane.getContentPane().setLayout(new BoxLayout());

If a JMenuBar component is set on the JRootPane, it is positioned along the upper edge of the frame. The contentPane is adjusted in location and size to fill the remaining area. (The JMenuBar and the contentPane are added to the layeredPane component at the JLayeredPane.FRAME_CONTENT_LAYER layer.)

The layeredPane is the parent of all children in the JRootPane -- both as the direct parent of the menu and the grandparent of all components added to the contentPane. It is an instance of JLayeredPane, which provides the ability to add components at several layers. This capability is very useful when working with menu popups, dialog boxes, and dragging -- situations in which you need to place a component on top of all other components in the pane.

The glassPane sits on top of all other components in the JRootPane. That provides a convenient place to draw above all other components, and makes it possible to intercept mouse events, which is useful both for dragging and for drawing. Developers can use setVisible on the glassPane to control when the glassPane displays over the other children. By default the glassPane is not visible.

The custom LayoutManager used by JRootPane ensures that:

1. The glassPane fills the entire viewable area of the JRootPane (bounds - insets).
2. The layeredPane fills the entire viewable area of the JRootPane. (bounds - insets)
3. The menuBar is positioned at the upper edge of the layeredPane.
4. The contentPane fills the entire viewable area, minus the menuBar, if present.

Any other views in the JRootPane view hierarchy are ignored.

If you replace the LayoutManager of the JRootPane, you are responsible for managing all of these views. So ordinarily you will want to be sure that you change the layout manager for the contentPane rather than for the JRootPane itself!

The painting architecture of Swing requires an opaque JComponent to exist in the containment hierarchy above all other components. This is typically provided by way of the content pane. If you replace the content pane, it is recommended that you make the content pane opaque by way of setOpaque(true). Additionally, if the content pane overrides paintComponent, it will need to completely fill in the background in an opaque color in paintComponent.

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 has been added to the java.beans package. Please see XMLEncoder.

Since:

1.2

See Also:

• JLayeredPane
• JMenuBar
• JWindow
• JFrame
• JDialog
• JInternalFrame
• JComponent
• BoxLayout
• Mixing Heavy and Light Components

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	JRootPane.AccessibleJRootPane	This class implements accessibility support for the JRootPane class.
protected class	JRootPane.RootLayout	A custom layout manager that is responsible for the layout of layeredPane, glassPane, and menuBar.

Nested classes/interfaces declared in class JComponent

JComponent.AccessibleJComponent

Modifier and Type	Class	Description
class	JComponent.AccessibleJComponent	Inner class of JComponent used to provide default support for accessibility.

Nested classes/interfaces declared in class Container

Container.AccessibleAWTContainer

Modifier and Type	Class	Description
protected class	Container.AccessibleAWTContainer	Inner class of Container used to provide default support for accessibility.

Nested classes/interfaces declared in class Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Modifier and Type	Class	Description
protected class	Component.AccessibleAWTComponent	Inner class of Component used to provide default support for accessibility.
static enum	Component.BaselineResizeBehavior	Enumeration of the common ways the baseline of a component can change as the size changes.
protected class	Component.BltBufferStrategy	Inner class for blitting offscreen surfaces to a component.
protected class	Component.FlipBufferStrategy	Inner class for flipping buffers on a component.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	COLOR_CHOOSER_DIALOG	Constant used for the windowDecorationStyle property.
protected Container	contentPane	The content pane.
protected JButton	defaultButton	The button that gets activated when the pane has the focus and a UI-specific action like pressing the Enter key occurs.
static final int	ERROR_DIALOG	Constant used for the windowDecorationStyle property.
static final int	FILE_CHOOSER_DIALOG	Constant used for the windowDecorationStyle property.
static final int	FRAME	Constant used for the windowDecorationStyle property.
protected Component	glassPane	The glass pane that overlays the menu bar and content pane, so it can intercept mouse movements and such.
static final int	INFORMATION_DIALOG	Constant used for the windowDecorationStyle property.
protected JLayeredPane	layeredPane	The layered pane that manages the menu bar and content pane.
protected JMenuBar	menuBar	The menu bar.
static final int	NONE	Constant used for the windowDecorationStyle property.
static final int	PLAIN_DIALOG	Constant used for the windowDecorationStyle property.
static final int	QUESTION_DIALOG	Constant used for the windowDecorationStyle property.
static final int	WARNING_DIALOG	Constant used for the windowDecorationStyle property.

Fields declared in class JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Modifier and Type	Field	Description
protected EventListenerList	listenerList	A list of event listeners for this component.
static final String	TOOL_TIP_TEXT_KEY	The comment to display when the cursor is over the component, also known as a "value tip", "flyover help", or "flyover label".
protected ComponentUI	ui	The look and feel delegate for this component.
static final int	UNDEFINED_CONDITION	Constant used by some of the APIs to mean that no condition is defined.
static final int	WHEN_ANCESTOR_OF_FOCUSED_COMPONENT	Constant used for registerKeyboardAction that means that the command should be invoked when the receiving component is an ancestor of the focused component or is itself the focused component.
static final int	WHEN_FOCUSED	Constant used for registerKeyboardAction that means that the command should be invoked when the component has the focus.
static final int	WHEN_IN_FOCUSED_WINDOW	Constant used for registerKeyboardAction that means that the command should be invoked when the receiving component is in the window that has the focus or is itself the focused component.

Fields declared in class Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Modifier and Type	Field	Description
protected AccessibleContext	accessibleContext	The AccessibleContext associated with this Component.
static final float	BOTTOM_ALIGNMENT	Ease-of-use constant for getAlignmentY.
static final float	CENTER_ALIGNMENT	Ease-of-use constant for getAlignmentY and getAlignmentX.
static final float	LEFT_ALIGNMENT	Ease-of-use constant for getAlignmentX.
static final float	RIGHT_ALIGNMENT	Ease-of-use constant for getAlignmentX.
static final float	TOP_ALIGNMENT	Ease-of-use constant for getAlignmentY().

Fields declared in interface ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Modifier and Type	Field	Description
static final int	ABORT	This flag in the infoflags argument to imageUpdate indicates that an image which was being tracked asynchronously was aborted before production was complete.
static final int	ALLBITS	This flag in the infoflags argument to imageUpdate indicates that a static image which was previously drawn is now complete and can be drawn again in its final form.
static final int	ERROR	This flag in the infoflags argument to imageUpdate indicates that an image which was being tracked asynchronously has encountered an error.
static final int	FRAMEBITS	This flag in the infoflags argument to imageUpdate indicates that another complete frame of a multi-frame image which was previously drawn is now available to be drawn again.
static final int	HEIGHT	This flag in the infoflags argument to imageUpdate indicates that the height of the base image is now available and can be taken from the height argument to the imageUpdate callback method.
static final int	PROPERTIES	This flag in the infoflags argument to imageUpdate indicates that the properties of the image are now available.
static final int	SOMEBITS	This flag in the infoflags argument to imageUpdate indicates that more pixels needed for drawing a scaled variation of the image are available.
static final int	WIDTH	This flag in the infoflags argument to imageUpdate indicates that the width of the base image is now available and can be taken from the width argument to the imageUpdate callback method.

Constructor Summary

Constructors

Constructor	Description
JRootPane()	Creates a JRootPane, setting up its glassPane, layeredPane, and contentPane.

Method Summary

Modifier and Type	Method	Description
protected void	addImpl(Component comp, Object constraints, int index)	Overridden to enforce the position of the glass component as the zero child.
protected Container	createContentPane()	Called by the constructor methods to create the default contentPane.
protected Component	createGlassPane()	Called by the constructor methods to create the default glassPane.
protected JLayeredPane	createLayeredPane()	Called by the constructor methods to create the default layeredPane.
protected LayoutManager	createRootLayout()	Called by the constructor methods to create the default layoutManager.
AccessibleContext	getAccessibleContext()	Gets the AccessibleContext associated with this JRootPane.
Container	getContentPane()	Returns the content pane -- the container that holds the components parented by the root pane.
JButton	getDefaultButton()	Returns the value of the defaultButton property.
Component	getGlassPane()	Returns the current glass pane for this JRootPane.
JMenuBar	getJMenuBar()	Returns the menu bar from the layered pane.
JLayeredPane	getLayeredPane()	Gets the layered pane used by the root pane.
JMenuBar	getMenuBar()	Deprecated. As of Swing version 1.0.3 replaced by getJMenuBar().
RootPaneUI	getUI()	Returns the L&F object that renders this component.
String	getUIClassID()	Returns a string that specifies the name of the L&F class that renders this component.
int	getWindowDecorationStyle()	Returns a constant identifying the type of Window decorations the JRootPane is providing.
boolean	isOptimizedDrawingEnabled()	The glassPane and contentPane have the same bounds, which means JRootPane does not tiles its children and this should return false.
boolean	isValidateRoot()	If a descendant of this JRootPane calls revalidate, validate from here on down.
protected String	paramString()	Returns a string representation of this JRootPane.
void	setContentPane(Container content)	Sets the content pane -- the container that holds the components parented by the root pane.
void	setDefaultButton(JButton defaultButton)	Sets the defaultButton property, which determines the current default button for this JRootPane.
void	setDoubleBuffered(boolean aFlag)	Sets whether this component should use a buffer to paint.
void	setGlassPane(Component glass)	Sets a specified Component to be the glass pane for this root pane.
void	setJMenuBar(JMenuBar menu)	Adds or changes the menu bar used in the layered pane.
void	setLayeredPane(JLayeredPane layered)	Sets the layered pane for the root pane.
void	setMenuBar(JMenuBar menu)	Deprecated. As of Swing version 1.0.3 replaced by setJMenuBar(JMenuBar menu).
void	setUI(RootPaneUI ui)	Sets the L&F object that renders this component.
void	setWindowDecorationStyle(int windowDecorationStyle)	Sets the type of Window decorations (such as borders, widgets for closing a Window, title ...) the JRootPane should provide.
void	updateUI()	Resets the UI property to a value from the current look and feel.

Methods declared in class JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, 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, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Modifier and Type	Method	Description
void	addAncestorListener(AncestorListener listener)	Registers listener so that it will receive AncestorEvents when it or any of its ancestors move or are made visible or invisible.
void	addNotify()	Notifies this component that it now has a parent component.
void	addVetoableChangeListener(VetoableChangeListener listener)	Adds a VetoableChangeListener to the listener list.
void	computeVisibleRect(Rectangle visibleRect)	Returns the Component's "visible rect rectangle" - the intersection of the visible rectangles for this component and all of its ancestors.
boolean	contains(int x, int y)	Gives the UI delegate an opportunity to define the precise shape of this component for the sake of mouse processing.
JToolTip	createToolTip()	Returns the instance of JToolTip that should be used to display the tooltip.
void	disable()	Deprecated. As of JDK version 1.1, replaced by java.awt.Component.setEnabled(boolean).
void	enable()	Deprecated. As of JDK version 1.1, replaced by java.awt.Component.setEnabled(boolean).
void	firePropertyChange(String propertyName, boolean oldValue, boolean newValue)	Support for reporting bound property changes for boolean properties.
void	firePropertyChange(String propertyName, int oldValue, int newValue)	Support for reporting bound property changes for integer properties.
protected void	fireVetoableChange(String propertyName, Object oldValue, Object newValue)	Supports reporting constrained property changes.
ActionListener	getActionForKeyStroke(KeyStroke aKeyStroke)	Returns the object that will perform the action registered for a given keystroke.
final ActionMap	getActionMap()	Returns the ActionMap used to determine what Action to fire for particular KeyStroke binding.
float	getAlignmentX()	Overrides Container.getAlignmentX to return the horizontal alignment.
float	getAlignmentY()	Overrides Container.getAlignmentY to return the vertical alignment.
AncestorListener[]	getAncestorListeners()	Returns an array of all the ancestor listeners registered on this component.
boolean	getAutoscrolls()	Gets the autoscrolls property.
int	getBaseline(int width, int height)	Returns the baseline.
Component.BaselineResizeBehavior	getBaselineResizeBehavior()	Returns an enum indicating how the baseline of the component changes as the size changes.
Border	getBorder()	Returns the border of this component or null if no border is currently set.
Rectangle	getBounds(Rectangle rv)	Stores the bounds of this component into "return value" rv and returns rv.
final Object	getClientProperty(Object key)	Returns the value of the property with the specified key.
protected Graphics	getComponentGraphics(Graphics g)	Returns the graphics object used to paint this component.
JPopupMenu	getComponentPopupMenu()	Returns JPopupMenu that assigned for this component.
int	getConditionForKeyStroke(KeyStroke aKeyStroke)	Returns the condition that determines whether a registered action occurs in response to the specified keystroke.
int	getDebugGraphicsOptions()	Returns the state of graphics debugging.
static Locale	getDefaultLocale()	Returns the default locale used to initialize each JComponent's locale property upon creation.
FontMetrics	getFontMetrics(Font font)	Gets the FontMetrics for the specified Font.
Graphics	getGraphics()	Returns this component's graphics context, which lets you draw on a component.
int	getHeight()	Returns the current height of this component.
boolean	getInheritsPopupMenu()	Returns true if the JPopupMenu should be inherited from the parent.
final InputMap	getInputMap()	Returns the InputMap that is used when the component has focus.
final InputMap	getInputMap(int condition)	Returns the InputMap that is used during condition.
InputVerifier	getInputVerifier()	Returns the input verifier for this component.
Insets	getInsets()	If a border has been set on this component, returns the border's insets; otherwise calls super.getInsets.
Insets	getInsets(Insets insets)	Returns an Insets object containing this component's inset values.
<T extends EventListener> T[]	getListeners(Class<T> listenerType)	Returns an array of all the objects currently registered as FooListeners upon this JComponent.
Point	getLocation(Point rv)	Stores the x,y origin of this component into "return value" rv and returns rv.
Dimension	getMaximumSize()	If the maximum size has been set to a non-null value just returns it.
Dimension	getMinimumSize()	If the minimum size has been set to a non-null value just returns it.
Component	getNextFocusableComponent()	Deprecated. As of 1.4, replaced by FocusTraversalPolicy.
Point	getPopupLocation(MouseEvent event)	Returns the preferred location to display the popup menu in this component's coordinate system.
Dimension	getPreferredSize()	If the preferredSize has been set to a non-null value just returns it.
KeyStroke[]	getRegisteredKeyStrokes()	Returns the KeyStrokes that will initiate registered actions.
JRootPane	getRootPane()	Returns the JRootPane ancestor for this component.
Dimension	getSize(Dimension rv)	Stores the width/height of this component into "return value" rv and returns rv.
Point	getToolTipLocation(MouseEvent event)	Returns the tooltip location in this component's coordinate system.
String	getToolTipText()	Returns the tooltip string that has been set with setToolTipText.
String	getToolTipText(MouseEvent event)	Returns the string to be used as the tooltip for event.
Container	getTopLevelAncestor()	Returns the top-level ancestor of this component (the containing Window) or null if this component has not been added to any container.
TransferHandler	getTransferHandler()	Gets the transferHandler property.
boolean	getVerifyInputWhenFocusTarget()	Returns the value that indicates whether the input verifier for the current focus owner will be called before this component requests focus.
VetoableChangeListener[]	getVetoableChangeListeners()	Returns an array of all the vetoable change listeners registered on this component.
Rectangle	getVisibleRect()	Returns the Component's "visible rectangle" - the intersection of this component's visible rectangle, new Rectangle(0, 0, getWidth(), getHeight()), and all of its ancestors' visible rectangles.
int	getWidth()	Returns the current width of this component.
int	getX()	Returns the current x coordinate of the component's origin.
int	getY()	Returns the current y coordinate of the component's origin.
void	grabFocus()	Requests that this Component get the input focus, and that this Component's top-level ancestor become the focused Window.
void	hide()	Deprecated.
boolean	isDoubleBuffered()	Returns whether this component should use a buffer to paint.
static boolean	isLightweightComponent(Component c)	Returns true if this component is lightweight, that is, if it doesn't have a native window system peer.
boolean	isManagingFocus()	Deprecated. As of 1.4, replaced by Component.setFocusTraversalKeys(int, Set) and Container.setFocusCycleRoot(boolean).
boolean	isOpaque()	Returns true if this component is completely opaque.
final boolean	isPaintingForPrint()	Returns true if the current painting operation on this component is part of a print operation.
protected boolean	isPaintingOrigin()	Returns true if a paint triggered on a child component should cause painting to originate from this Component, or one of its ancestors.
boolean	isPaintingTile()	Returns true if the component is currently painting a tile.
boolean	isRequestFocusEnabled()	Returns true if this JComponent should get focus; otherwise returns false.
void	paint(Graphics g)	Invoked by Swing to draw components.
protected void	paintBorder(Graphics g)	Paints the component's border.
protected void	paintChildren(Graphics g)	Paints this component's children.
protected void	paintComponent(Graphics g)	Calls the UI delegate's paint method, if the UI delegate is non-null.
void	paintImmediately(int x, int y, int w, int h)	Paints the specified region in this component and all of its descendants that overlap the region, immediately.
void	paintImmediately(Rectangle r)	Paints the specified region now.
void	print(Graphics g)	Invoke this method to print the component to the specified Graphics.
void	printAll(Graphics g)	Invoke this method to print the component.
protected void	printBorder(Graphics g)	Prints the component's border.
protected void	printChildren(Graphics g)	Prints this component's children.
protected void	printComponent(Graphics g)	This is invoked during a printing operation.
protected void	processComponentKeyEvent(KeyEvent e)	Processes any key events that the component itself recognizes.
protected boolean	processKeyBinding(KeyStroke ks, KeyEvent e, int condition, boolean pressed)	Invoked to process the key bindings for ks as the result of the KeyEvent e.
protected void	processKeyEvent(KeyEvent e)	Overrides processKeyEvent to process events.
protected void	processMouseEvent(MouseEvent e)	Processes mouse events occurring on this component by dispatching them to any registered MouseListener objects, refer to Component.processMouseEvent(MouseEvent) for a complete description of this method.
protected void	processMouseMotionEvent(MouseEvent e)	Processes mouse motion events, such as MouseEvent.MOUSE_DRAGGED.
final void	putClientProperty(Object key, Object value)	Adds an arbitrary key/value "client property" to this component.
void	registerKeyboardAction(ActionListener anAction, String aCommand, KeyStroke aKeyStroke, int aCondition)	This method is now obsolete, please use a combination of getActionMap() and getInputMap() for similar behavior.
void	registerKeyboardAction(ActionListener anAction, KeyStroke aKeyStroke, int aCondition)	This method is now obsolete, please use a combination of getActionMap() and getInputMap() for similar behavior.
void	removeAncestorListener(AncestorListener listener)	Unregisters listener so that it will no longer receive AncestorEvents.
void	removeNotify()	Notifies this component that it no longer has a parent component.
void	removeVetoableChangeListener(VetoableChangeListener listener)	Removes a VetoableChangeListener from the listener list.
void	repaint(long tm, int x, int y, int width, int height)	Adds the specified region to the dirty region list if the component is showing.
void	repaint(Rectangle r)	Adds the specified region to the dirty region list if the component is showing.
boolean	requestDefaultFocus()	Deprecated. As of 1.4, replaced by FocusTraversalPolicy.getDefaultComponent(Container).requestFocus()
void	requestFocus()	Requests that this Component gets the input focus.
boolean	requestFocus(boolean temporary)	Requests that this Component gets the input focus.
boolean	requestFocusInWindow()	Requests that this Component gets the input focus.
protected boolean	requestFocusInWindow(boolean temporary)	Requests that this Component gets the input focus.
void	resetKeyboardActions()	Unregisters all the bindings in the first tier InputMaps and ActionMap.
void	reshape(int x, int y, int w, int h)	Deprecated. As of JDK 5, replaced by Component.setBounds(int, int, int, int).
void	revalidate()	Supports deferred automatic layout.
void	scrollRectToVisible(Rectangle aRect)	Forwards the scrollRectToVisible() message to the JComponent's parent.
final void	setActionMap(ActionMap am)	Sets the ActionMap to am.
void	setAlignmentX(float alignmentX)	Sets the horizontal alignment.
void	setAlignmentY(float alignmentY)	Sets the vertical alignment.
void	setAutoscrolls(boolean autoscrolls)	Sets the autoscrolls property.
void	setBackground(Color bg)	Sets the background color of this component.
void	setBorder(Border border)	Sets the border of this component.
void	setComponentPopupMenu(JPopupMenu popup)	Sets the JPopupMenu for this JComponent.
void	setDebugGraphicsOptions(int debugOptions)	Enables or disables diagnostic information about every graphics operation performed within the component or one of its children.
static void	setDefaultLocale(Locale l)	Sets the default locale used to initialize each JComponent's locale property upon creation.
void	setEnabled(boolean enabled)	Sets whether or not this component is enabled.
void	setFocusTraversalKeys(int id, Set<? extends AWTKeyStroke> keystrokes)	Sets the focus traversal keys for a given traversal operation for this Component.
void	setFont(Font font)	Sets the font for this component.
void	setForeground(Color fg)	Sets the foreground color of this component.
void	setInheritsPopupMenu(boolean value)	Sets whether or not getComponentPopupMenu should delegate to the parent if this component does not have a JPopupMenu assigned to it.
final void	setInputMap(int condition, InputMap map)	Sets the InputMap to use under the condition condition to map.
void	setInputVerifier(InputVerifier inputVerifier)	Sets the input verifier for this component.
void	setMaximumSize(Dimension maximumSize)	Sets the maximum size of this component to a constant value.
void	setMinimumSize(Dimension minimumSize)	Sets the minimum size of this component to a constant value.
void	setNextFocusableComponent(Component aComponent)	Deprecated. As of 1.4, replaced by FocusTraversalPolicy
void	setOpaque(boolean isOpaque)	If true the component paints every pixel within its bounds.
void	setPreferredSize(Dimension preferredSize)	Sets the preferred size of this component.
void	setRequestFocusEnabled(boolean requestFocusEnabled)	Provides a hint as to whether or not this JComponent should get focus.
void	setToolTipText(String text)	Registers the text to display in a tool tip.
void	setTransferHandler(TransferHandler newHandler)	Sets the TransferHandler, which provides support for transfer of data into and out of this component via cut/copy/paste and drag and drop.
protected void	setUI(ComponentUI newUI)	Sets the look and feel delegate for this component.
void	setVerifyInputWhenFocusTarget(boolean verifyInputWhenFocusTarget)	Sets the value to indicate whether input verifier for the current focus owner will be called before this component requests focus.
void	setVisible(boolean aFlag)	Makes the component visible or invisible.
void	unregisterKeyboardAction(KeyStroke aKeyStroke)	This method is now obsolete.
void	update(Graphics g)	Calls paint.

Methods declared in class 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, setLayout, transferFocusDownCycle, validate, validateTree

Modifier and Type	Method	Description
Component	add(Component comp)	Appends the specified component to the end of this container.
Component	add(Component comp, int index)	Adds the specified component to this container at the given position.
void	add(Component comp, Object constraints)	Adds the specified component to the end of this container.
void	add(Component comp, Object constraints, int index)	Adds the specified component to this container with the specified constraints at the specified index.
Component	add(String name, Component comp)	Adds the specified component to this container.
void	addContainerListener(ContainerListener l)	Adds the specified container listener to receive container events from this container.
void	addPropertyChangeListener(PropertyChangeListener listener)	Adds a PropertyChangeListener to the listener list.
void	addPropertyChangeListener(String propertyName, PropertyChangeListener listener)	Adds a PropertyChangeListener to the listener list for a specific property.
void	applyComponentOrientation(ComponentOrientation o)	Sets the ComponentOrientation property of this container and all components contained within it.
boolean	areFocusTraversalKeysSet(int id)	Returns whether the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Container.
int	countComponents()	Deprecated. As of JDK version 1.1, replaced by getComponentCount().
void	deliverEvent(Event e)	Deprecated. As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e)
void	doLayout()	Causes this container to lay out its components.
Component	findComponentAt(int x, int y)	Locates the visible child component that contains the specified position.
Component	findComponentAt(Point p)	Locates the visible child component that contains the specified point.
Component	getComponent(int n)	Gets the nth component in this container.
Component	getComponentAt(int x, int y)	Locates the component that contains the x,y position.
Component	getComponentAt(Point p)	Gets the component that contains the specified point.
int	getComponentCount()	Gets the number of components in this panel.
Component[]	getComponents()	Gets all the components in this container.
int	getComponentZOrder(Component comp)	Returns the z-order index of the component inside the container.
ContainerListener[]	getContainerListeners()	Returns an array of all the container listeners registered on this container.
Set<AWTKeyStroke>	getFocusTraversalKeys(int id)	Returns the Set of focus traversal keys for a given traversal operation for this Container.
FocusTraversalPolicy	getFocusTraversalPolicy()	Returns the focus traversal policy that will manage keyboard traversal of this Container's children, or null if this Container is not a focus cycle root.
LayoutManager	getLayout()	Gets the layout manager for this container.
Point	getMousePosition(boolean allowChildren)	Returns the position of the mouse pointer in this Container's coordinate space if the Container is under the mouse pointer, otherwise returns null.
Insets	insets()	Deprecated. As of JDK version 1.1, replaced by getInsets().
void	invalidate()	Invalidates the container.
boolean	isAncestorOf(Component c)	Checks if the component is contained in the component hierarchy of this container.
boolean	isFocusCycleRoot()	Returns whether this Container is the root of a focus traversal cycle.
boolean	isFocusCycleRoot(Container container)	Returns whether the specified Container is the focus cycle root of this Container's focus traversal cycle.
final boolean	isFocusTraversalPolicyProvider()	Returns whether this container provides focus traversal policy.
boolean	isFocusTraversalPolicySet()	Returns whether the focus traversal policy has been explicitly set for this Container.
void	layout()	Deprecated. As of JDK version 1.1, replaced by doLayout().
void	list(PrintStream out, int indent)	Prints a listing of this container to the specified output stream.
void	list(PrintWriter out, int indent)	Prints out a list, starting at the specified indentation, to the specified print writer.
Component	locate(int x, int y)	Deprecated. As of JDK version 1.1, replaced by getComponentAt(int, int).
Dimension	minimumSize()	Deprecated. As of JDK version 1.1, replaced by getMinimumSize().
void	paintComponents(Graphics g)	Paints each of the components in this container.
Dimension	preferredSize()	Deprecated. As of JDK version 1.1, replaced by getPreferredSize().
void	printComponents(Graphics g)	Prints each of the components in this container.
protected void	processContainerEvent(ContainerEvent e)	Processes container events occurring on this container by dispatching them to any registered ContainerListener objects.
protected void	processEvent(AWTEvent e)	Processes events on this container.
void	remove(int index)	Removes the component, specified by index, from this container.
void	remove(Component comp)	Removes the specified component from this container.
void	removeAll()	Removes all the components from this container.
void	removeContainerListener(ContainerListener l)	Removes the specified container listener so it no longer receives container events from this container.
void	setComponentZOrder(Component comp, int index)	Moves the specified component to the specified z-order index in the container.
void	setFocusCycleRoot(boolean focusCycleRoot)	Sets whether this Container is the root of a focus traversal cycle.
void	setFocusTraversalPolicy(FocusTraversalPolicy policy)	Sets the focus traversal policy that will manage keyboard traversal of this Container's children, if this Container is a focus cycle root.
final void	setFocusTraversalPolicyProvider(boolean provider)	Sets whether this container will be used to provide focus traversal policy.
void	setLayout(LayoutManager mgr)	Sets the layout manager for this container.
void	transferFocusDownCycle()	Transfers the focus down one focus traversal cycle.
void	validate()	Validates this container and all of its subcomponents.
protected void	validateTree()	Recursively descends the container tree and recomputes the layout for any subtrees marked as needing it (those marked as invalid).

Methods declared in class 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, 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, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, 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, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Modifier and Type	Method	Description
boolean	action(Event evt, Object what)	Deprecated. As of JDK version 1.1, should register this component as ActionListener on component which fires action events.
void	add(PopupMenu popup)	Adds the specified popup menu to the component.
void	addComponentListener(ComponentListener l)	Adds the specified component listener to receive component events from this component.
void	addFocusListener(FocusListener l)	Adds the specified focus listener to receive focus events from this component when this component gains input focus.
void	addHierarchyBoundsListener(HierarchyBoundsListener l)	Adds the specified hierarchy bounds listener to receive hierarchy bounds events from this component when the hierarchy to which this container belongs changes.
void	addHierarchyListener(HierarchyListener l)	Adds the specified hierarchy listener to receive hierarchy changed events from this component when the hierarchy to which this container belongs changes.
void	addInputMethodListener(InputMethodListener l)	Adds the specified input method listener to receive input method events from this component.
void	addKeyListener(KeyListener l)	Adds the specified key listener to receive key events from this component.
void	addMouseListener(MouseListener l)	Adds the specified mouse listener to receive mouse events from this component.
void	addMouseMotionListener(MouseMotionListener l)	Adds the specified mouse motion listener to receive mouse motion events from this component.
void	addMouseWheelListener(MouseWheelListener l)	Adds the specified mouse wheel listener to receive mouse wheel events from this component.
Rectangle	bounds()	Deprecated. As of JDK version 1.1, replaced by getBounds().
int	checkImage(Image image, int width, int height, ImageObserver observer)	Returns the status of the construction of a screen representation of the specified image.
int	checkImage(Image image, ImageObserver observer)	Returns the status of the construction of a screen representation of the specified image.
protected AWTEvent	coalesceEvents(AWTEvent existingEvent, AWTEvent newEvent)	Potentially coalesce an event being posted with an existing event.
boolean	contains(Point p)	Checks whether this component "contains" the specified point, where the point's x and y coordinates are defined to be relative to the coordinate system of this component.
Image	createImage(int width, int height)	Creates an off-screen drawable image to be used for double buffering.
Image	createImage(ImageProducer producer)	Creates an image from the specified image producer.
VolatileImage	createVolatileImage(int width, int height)	Creates a volatile off-screen drawable image to be used for double buffering.
VolatileImage	createVolatileImage(int width, int height, ImageCapabilities caps)	Creates a volatile off-screen drawable image, with the given capabilities.
protected final void	disableEvents(long eventsToDisable)	Disables the events defined by the specified event mask parameter from being delivered to this component.
final void	dispatchEvent(AWTEvent e)	Dispatches an event to this component or one of its sub components.
void	enable(boolean b)	Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean).
protected final void	enableEvents(long eventsToEnable)	Enables the events defined by the specified event mask parameter to be delivered to this component.
void	enableInputMethods(boolean enable)	Enables or disables input method support for this component.
void	firePropertyChange(String propertyName, byte oldValue, byte newValue)	Reports a bound property change.
void	firePropertyChange(String propertyName, char oldValue, char newValue)	Reports a bound property change.
void	firePropertyChange(String propertyName, double oldValue, double newValue)	Reports a bound property change.
void	firePropertyChange(String propertyName, float oldValue, float newValue)	Reports a bound property change.
void	firePropertyChange(String propertyName, long oldValue, long newValue)	Reports a bound property change.
void	firePropertyChange(String propertyName, short oldValue, short newValue)	Reports a bound property change.
protected void	firePropertyChange(String propertyName, Object oldValue, Object newValue)	Support for reporting bound property changes for Object properties.
Color	getBackground()	Gets the background color of this component.
Rectangle	getBounds()	Gets the bounds of this component in the form of a Rectangle object.
ColorModel	getColorModel()	Gets the instance of ColorModel used to display the component on the output device.
ComponentListener[]	getComponentListeners()	Returns an array of all the component listeners registered on this component.
ComponentOrientation	getComponentOrientation()	Retrieves the language-sensitive orientation that is to be used to order the elements or text within this component.
Cursor	getCursor()	Gets the cursor set in the component.
DropTarget	getDropTarget()	Gets the DropTarget associated with this Component.
Container	getFocusCycleRootAncestor()	Returns the Container which is the focus cycle root of this Component's focus traversal cycle.
FocusListener[]	getFocusListeners()	Returns an array of all the focus listeners registered on this component.
boolean	getFocusTraversalKeysEnabled()	Returns whether focus traversal keys are enabled for this Component.
Font	getFont()	Gets the font of this component.
Color	getForeground()	Gets the foreground color of this component.
GraphicsConfiguration	getGraphicsConfiguration()	Gets the GraphicsConfiguration associated with this Component.
HierarchyBoundsListener[]	getHierarchyBoundsListeners()	Returns an array of all the hierarchy bounds listeners registered on this component.
HierarchyListener[]	getHierarchyListeners()	Returns an array of all the hierarchy listeners registered on this component.
boolean	getIgnoreRepaint()	Returns whether or not paint messages received from the operating system should be ignored.
InputContext	getInputContext()	Gets the input context used by this component for handling the communication with input methods when text is entered in this component.
InputMethodListener[]	getInputMethodListeners()	Returns an array of all the input method listeners registered on this component.
InputMethodRequests	getInputMethodRequests()	Gets the input method request handler which supports requests from input methods for this component.
KeyListener[]	getKeyListeners()	Returns an array of all the key listeners registered on this component.
Locale	getLocale()	Gets the locale of this component.
Point	getLocation()	Gets the location of this component in the form of a point specifying the component's top-left corner.
Point	getLocationOnScreen()	Gets the location of this component in the form of a point specifying the component's top-left corner in the screen's coordinate space.
MouseListener[]	getMouseListeners()	Returns an array of all the mouse listeners registered on this component.
MouseMotionListener[]	getMouseMotionListeners()	Returns an array of all the mouse motion listeners registered on this component.
Point	getMousePosition()	Returns the position of the mouse pointer in this Component's coordinate space if the Component is directly under the mouse pointer, otherwise returns null.
MouseWheelListener[]	getMouseWheelListeners()	Returns an array of all the mouse wheel listeners registered on this component.
String	getName()	Gets the name of the component.
Container	getParent()	Gets the parent of this component.
PropertyChangeListener[]	getPropertyChangeListeners()	Returns an array of all the property change listeners registered on this component.
PropertyChangeListener[]	getPropertyChangeListeners(String propertyName)	Returns an array of all the listeners which have been associated with the named property.
Dimension	getSize()	Returns the size of this component in the form of a Dimension object.
Toolkit	getToolkit()	Gets the toolkit of this component.
final Object	getTreeLock()	Gets this component's locking object (the object that owns the thread synchronization monitor) for AWT component-tree and layout operations.
boolean	gotFocus(Event evt, Object what)	Deprecated. As of JDK version 1.1, replaced by processFocusEvent(FocusEvent).
boolean	handleEvent(Event evt)	Deprecated. As of JDK version 1.1 replaced by processEvent(AWTEvent).
boolean	hasFocus()	Returns true if this Component is the focus owner.
boolean	imageUpdate(Image img, int infoflags, int x, int y, int w, int h)	Repaints the component when the image has changed.
boolean	inside(int x, int y)	Deprecated. As of JDK version 1.1, replaced by contains(int, int).
boolean	isBackgroundSet()	Returns whether the background color has been explicitly set for this Component.
boolean	isCursorSet()	Returns whether the cursor has been explicitly set for this Component.
boolean	isDisplayable()	Determines whether this component is displayable.
boolean	isEnabled()	Determines whether this component is enabled.
boolean	isFocusable()	Returns whether this Component can be focused.
boolean	isFocusOwner()	Returns true if this Component is the focus owner.
boolean	isFocusTraversable()	Deprecated. As of 1.4, replaced by isFocusable().
boolean	isFontSet()	Returns whether the font has been explicitly set for this Component.
boolean	isForegroundSet()	Returns whether the foreground color has been explicitly set for this Component.
boolean	isLightweight()	A lightweight component doesn't have a native toolkit peer.
boolean	isMaximumSizeSet()	Returns true if the maximum size has been set to a non-null value otherwise returns false.
boolean	isMinimumSizeSet()	Returns whether or not setMinimumSize has been invoked with a non-null value.
boolean	isPreferredSizeSet()	Returns true if the preferred size has been set to a non-null value otherwise returns false.
boolean	isShowing()	Determines whether this component is showing on screen.
boolean	isValid()	Determines whether this component is valid.
boolean	isVisible()	Determines whether this component should be visible when its parent is visible.
boolean	keyDown(Event evt, int key)	Deprecated. As of JDK version 1.1, replaced by processKeyEvent(KeyEvent).
boolean	keyUp(Event evt, int key)	Deprecated. As of JDK version 1.1, replaced by processKeyEvent(KeyEvent).
void	list()	Prints a listing of this component to the standard system output stream System.out.
void	list(PrintStream out)	Prints a listing of this component to the specified output stream.
void	list(PrintWriter out)	Prints a listing to the specified print writer.
Point	location()	Deprecated. As of JDK version 1.1, replaced by getLocation().
boolean	lostFocus(Event evt, Object what)	Deprecated. As of JDK version 1.1, replaced by processFocusEvent(FocusEvent).
boolean	mouseDown(Event evt, int x, int y)	Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent).
boolean	mouseDrag(Event evt, int x, int y)	Deprecated. As of JDK version 1.1, replaced by processMouseMotionEvent(MouseEvent).
boolean	mouseEnter(Event evt, int x, int y)	Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent).
boolean	mouseExit(Event evt, int x, int y)	Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent).
boolean	mouseMove(Event evt, int x, int y)	Deprecated. As of JDK version 1.1, replaced by processMouseMotionEvent(MouseEvent).
boolean	mouseUp(Event evt, int x, int y)	Deprecated. As of JDK version 1.1, replaced by processMouseEvent(MouseEvent).
void	move(int x, int y)	Deprecated. As of JDK version 1.1, replaced by setLocation(int, int).
void	nextFocus()	Deprecated. As of JDK version 1.1, replaced by transferFocus().
void	paintAll(Graphics g)	Paints this component and all of its subcomponents.
boolean	postEvent(Event e)	Deprecated. As of JDK version 1.1, replaced by dispatchEvent(AWTEvent).
boolean	prepareImage(Image image, int width, int height, ImageObserver observer)	Prepares an image for rendering on this component at the specified width and height.
boolean	prepareImage(Image image, ImageObserver observer)	Prepares an image for rendering on this component.
protected void	processComponentEvent(ComponentEvent e)	Processes component events occurring on this component by dispatching them to any registered ComponentListener objects.
protected void	processFocusEvent(FocusEvent e)	Processes focus events occurring on this component by dispatching them to any registered FocusListener objects.
protected void	processHierarchyBoundsEvent(HierarchyEvent e)	Processes hierarchy bounds events occurring on this component by dispatching them to any registered HierarchyBoundsListener objects.
protected void	processHierarchyEvent(HierarchyEvent e)	Processes hierarchy events occurring on this component by dispatching them to any registered HierarchyListener objects.
protected void	processInputMethodEvent(InputMethodEvent e)	Processes input method events occurring on this component by dispatching them to any registered InputMethodListener objects.
protected void	processMouseWheelEvent(MouseWheelEvent e)	Processes mouse wheel events occurring on this component by dispatching them to any registered MouseWheelListener objects.
void	remove(MenuComponent popup)	Removes the specified popup menu from the component.
void	removeComponentListener(ComponentListener l)	Removes the specified component listener so that it no longer receives component events from this component.
void	removeFocusListener(FocusListener l)	Removes the specified focus listener so that it no longer receives focus events from this component.
void	removeHierarchyBoundsListener(HierarchyBoundsListener l)	Removes the specified hierarchy bounds listener so that it no longer receives hierarchy bounds events from this component.
void	removeHierarchyListener(HierarchyListener l)	Removes the specified hierarchy listener so that it no longer receives hierarchy changed events from this component.
void	removeInputMethodListener(InputMethodListener l)	Removes the specified input method listener so that it no longer receives input method events from this component.
void	removeKeyListener(KeyListener l)	Removes the specified key listener so that it no longer receives key events from this component.
void	removeMouseListener(MouseListener l)	Removes the specified mouse listener so that it no longer receives mouse events from this component.
void	removeMouseMotionListener(MouseMotionListener l)	Removes the specified mouse motion listener so that it no longer receives mouse motion events from this component.
void	removeMouseWheelListener(MouseWheelListener l)	Removes the specified mouse wheel listener so that it no longer receives mouse wheel events from this component.
void	removePropertyChangeListener(PropertyChangeListener listener)	Removes a PropertyChangeListener from the listener list.
void	removePropertyChangeListener(String propertyName, PropertyChangeListener listener)	Removes a PropertyChangeListener from the listener list for a specific property.
void	repaint()	Repaints this component.
void	repaint(int x, int y, int width, int height)	Repaints the specified rectangle of this component.
void	repaint(long tm)	Repaints the component.
protected boolean	requestFocus(boolean temporary, FocusEvent.Cause cause)	Requests by the reason of cause that this Component get the input focus, and that this Component's top-level ancestor become the focused Window.
void	requestFocus(FocusEvent.Cause cause)	Requests by the reason of cause that this Component get the input focus, and that this Component's top-level ancestor become the focused Window.
boolean	requestFocusInWindow(FocusEvent.Cause cause)	Requests by the reason of cause that this Component get the input focus, if this Component's top-level ancestor is already the focused Window.
void	resize(int width, int height)	Deprecated. As of JDK version 1.1, replaced by setSize(int, int).
void	resize(Dimension d)	Deprecated. As of JDK version 1.1, replaced by setSize(Dimension).
void	setBounds(int x, int y, int width, int height)	Moves and resizes this component.
void	setBounds(Rectangle r)	Moves and resizes this component to conform to the new bounding rectangle r.
void	setComponentOrientation(ComponentOrientation o)	Sets the language-sensitive orientation that is to be used to order the elements or text within this component.
void	setCursor(Cursor cursor)	Sets the cursor image to the specified cursor.
void	setDropTarget(DropTarget dt)	Associate a DropTarget with this component.
void	setFocusable(boolean focusable)	Sets the focusable state of this Component to the specified value.
void	setFocusTraversalKeysEnabled(boolean focusTraversalKeysEnabled)	Sets whether focus traversal keys are enabled for this Component.
void	setIgnoreRepaint(boolean ignoreRepaint)	Sets whether or not paint messages received from the operating system should be ignored.
void	setLocale(Locale l)	Sets the locale of this component.
void	setLocation(int x, int y)	Moves this component to a new location.
void	setLocation(Point p)	Moves this component to a new location.
void	setMixingCutoutShape(Shape shape)	Sets a 'mixing-cutout' shape for this lightweight component.
void	setName(String name)	Sets the name of the component to the specified string.
void	setSize(int width, int height)	Resizes this component so that it has width width and height height.
void	setSize(Dimension d)	Resizes this component so that it has width d.width and height d.height.
void	show()	Deprecated. As of JDK version 1.1, replaced by setVisible(boolean).
void	show(boolean b)	Deprecated. As of JDK version 1.1, replaced by setVisible(boolean).
Dimension	size()	Deprecated. As of JDK version 1.1, replaced by getSize().
String	toString()	Returns a string representation of this component and its values.
void	transferFocus()	Transfers the focus to the next component, as though this Component were the focus owner.
void	transferFocusBackward()	Transfers the focus to the previous component, as though this Component were the focus owner.
void	transferFocusUpCycle()	Transfers the focus up one focus traversal cycle.

Methods declared in class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Field Details

NONE

public static final int NONE

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should not provide any sort of Window decorations.

Since:

1.4

See Also:

• Constant Field Values

FRAME

public static final int FRAME

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Frame.

Since:

1.4

See Also:

• Constant Field Values

PLAIN_DIALOG

public static final int PLAIN_DIALOG

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Dialog.

Since:

1.4

See Also:

• Constant Field Values

INFORMATION_DIALOG

public static final int INFORMATION_DIALOG

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Dialog used to display an informational message.

Since:

1.4

See Also:

• Constant Field Values

ERROR_DIALOG

public static final int ERROR_DIALOG

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Dialog used to display an error message.

Since:

1.4

See Also:

• Constant Field Values

COLOR_CHOOSER_DIALOG

public static final int COLOR_CHOOSER_DIALOG

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Dialog used to display a JColorChooser.

Since:

1.4

See Also:

• Constant Field Values

FILE_CHOOSER_DIALOG

public static final int FILE_CHOOSER_DIALOG

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Dialog used to display a JFileChooser.

Since:

1.4

See Also:

• Constant Field Values

QUESTION_DIALOG

public static final int QUESTION_DIALOG

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Dialog used to present a question to the user.

Since:

1.4

See Also:

• Constant Field Values

WARNING_DIALOG

public static final int WARNING_DIALOG

Constant used for the windowDecorationStyle property. Indicates that the JRootPane should provide decorations appropriate for a Dialog used to display a warning message.

Since:

1.4

See Also:

• Constant Field Values

menuBar

protected JMenuBar menuBar

The menu bar.

contentPane

protected Container contentPane

The content pane.

layeredPane

protected JLayeredPane layeredPane

The layered pane that manages the menu bar and content pane.

glassPane

protected Component glassPane

The glass pane that overlays the menu bar and content pane, so it can intercept mouse movements and such.

defaultButton

protected JButton defaultButton

The button that gets activated when the pane has the focus and a UI-specific action like pressing the Enter key occurs.

Constructor Details

JRootPane

public JRootPane()

Creates a JRootPane, setting up its glassPane, layeredPane, and contentPane.

Method Details

setDoubleBuffered

public void setDoubleBuffered(boolean aFlag)

Sets whether this component should use a buffer to paint. If set to true, all the drawing from this component will be done in an offscreen painting buffer. The offscreen painting buffer will the be copied onto the screen. If a Component is buffered and one of its ancestor is also buffered, the ancestor buffer will be used.

Overrides:

setDoubleBuffered in class JComponent

Parameters:

aFlag - if true, set this component to be double buffered

Since:

1.6

getWindowDecorationStyle

public int getWindowDecorationStyle()

Returns a constant identifying the type of Window decorations the JRootPane is providing.

Returns:

One of NONE, FRAME, PLAIN_DIALOG, INFORMATION_DIALOG, ERROR_DIALOG, COLOR_CHOOSER_DIALOG, FILE_CHOOSER_DIALOG, QUESTION_DIALOG or WARNING_DIALOG.

Since:

1.4

See Also:

• setWindowDecorationStyle(int)

setWindowDecorationStyle

@BeanProperty(expert=true,
              visualUpdate=true,
              enumerationValues={"JRootPane.NONE","JRootPane.FRAME","JRootPane.PLAIN_DIALOG","JRootPane.INFORMATION_DIALOG","JRootPane.ERROR_DIALOG","JRootPane.COLOR_CHOOSER_DIALOG","JRootPane.FILE_CHOOSER_DIALOG","JRootPane.QUESTION_DIALOG","JRootPane.WARNING_DIALOG"},
              description="Identifies the type of Window decorations to provide")
public void setWindowDecorationStyle(int windowDecorationStyle)

Sets the type of Window decorations (such as borders, widgets for closing a Window, title ...) the JRootPane should provide. The default is to provide no Window decorations (NONE).

This is only a hint, and some look and feels may not support this. This is a bound property.

Parameters:

windowDecorationStyle - Constant identifying Window decorations to provide.

Throws:

IllegalArgumentException - if style is not one of: NONE, FRAME, PLAIN_DIALOG, INFORMATION_DIALOG, ERROR_DIALOG, COLOR_CHOOSER_DIALOG, FILE_CHOOSER_DIALOG, QUESTION_DIALOG, or WARNING_DIALOG.

Since:

1.4

See Also:

• JDialog.setDefaultLookAndFeelDecorated(boolean)
• JFrame.setDefaultLookAndFeelDecorated(boolean)
• LookAndFeel.getSupportsWindowDecorations()

getUI

public RootPaneUI getUI()

Returns the L&F object that renders this component.

Overrides:

getUI in class JComponent

Returns:

LabelUI object

Since:

1.3

setUI

@BeanProperty(expert=true,
              hidden=true,
              visualUpdate=true,
              description="The UI object that implements the Component's LookAndFeel.")
public void setUI(RootPaneUI ui)

Sets the L&F object that renders this component.

Parameters:

ui - the LabelUI L&F object

Since:

1.3

See Also:

• UIDefaults.getUI(JComponent)

updateUI

public void updateUI()

Resets the UI property to a value from the current look and feel.

Overrides:

updateUI in class JComponent

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 "RootPaneUI"

See Also:

• JComponent.getUIClassID()
• UIDefaults.getUI(JComponent)

createLayeredPane

protected JLayeredPane createLayeredPane()

Called by the constructor methods to create the default layeredPane. Bt default it creates a new JLayeredPane.

Returns:

the default layeredPane

createContentPane

protected Container createContentPane()

Called by the constructor methods to create the default contentPane. By default this method creates a new JComponent add sets a BorderLayout as its LayoutManager.

Returns:

the default contentPane

createGlassPane

protected Component createGlassPane()

Called by the constructor methods to create the default glassPane. By default this method creates a new JComponent with visibility set to false.

Returns:

the default glassPane

createRootLayout

protected LayoutManager createRootLayout()

Called by the constructor methods to create the default layoutManager.

Returns:

the default layoutManager.

setJMenuBar

public void setJMenuBar(JMenuBar menu)

Adds or changes the menu bar used in the layered pane.

Parameters:

menu - the JMenuBar to add

setMenuBar

@Deprecated
public void setMenuBar(JMenuBar menu)

Deprecated.

As of Swing version 1.0.3 replaced by setJMenuBar(JMenuBar menu).

Specifies the menu bar value.

Parameters:

menu - the JMenuBar to add.

getJMenuBar

public JMenuBar getJMenuBar()

Returns the menu bar from the layered pane.

Returns:

the JMenuBar used in the pane

getMenuBar

@Deprecated
public JMenuBar getMenuBar()

Deprecated.

As of Swing version 1.0.3 replaced by getJMenuBar().

Returns the menu bar value.

Returns:

the JMenuBar used in the pane

setContentPane

public void setContentPane(Container content)

Sets the content pane -- the container that holds the components parented by the root pane.

Swing's painting architecture requires an opaque JComponent in the containment hierarchy. This is typically provided by the content pane. If you replace the content pane it is recommended you replace it with an opaque JComponent.

Parameters:

content - the Container to use for component-contents

Throws:

IllegalComponentStateException - (a runtime exception) if the content pane parameter is null

getContentPane

public Container getContentPane()

Returns the content pane -- the container that holds the components parented by the root pane.

Returns:

the Container that holds the component-contents

setLayeredPane

public void setLayeredPane(JLayeredPane layered)

Sets the layered pane for the root pane. The layered pane typically holds a content pane and an optional JMenuBar.

Parameters:

layered - the JLayeredPane to use

Throws:

IllegalComponentStateException - (a runtime exception) if the layered pane parameter is null

getLayeredPane

public JLayeredPane getLayeredPane()

Gets the layered pane used by the root pane. The layered pane typically holds a content pane and an optional JMenuBar.

Returns:

the JLayeredPane currently in use

setGlassPane

public void setGlassPane(Component glass)

Sets a specified Component to be the glass pane for this root pane. The glass pane should normally be a lightweight, transparent component, because it will be made visible when ever the root pane needs to grab input events.

The new glass pane's visibility is changed to match that of the current glass pane. An implication of this is that care must be taken when you want to replace the glass pane and make it visible. Either of the following will work:

  root.setGlassPane(newGlassPane);
  newGlassPane.setVisible(true);

or:

  root.getGlassPane().setVisible(true);
  root.setGlassPane(newGlassPane);

Parameters:

glass - the Component to use as the glass pane for this JRootPane

Throws:

NullPointerException - if the glass parameter is null

getGlassPane

public Component getGlassPane()

Returns the current glass pane for this JRootPane.

Returns:

the current glass pane

See Also:

• setGlassPane(Component)

isValidateRoot

public boolean isValidateRoot()

If a descendant of this JRootPane calls revalidate, validate from here on down.

Deferred requests to layout a component and its descendents again. For example, calls to revalidate, are pushed upwards to either a JRootPane or a JScrollPane because both classes override isValidateRoot to return true.

Overrides:

isValidateRoot in class JComponent

Returns:

true

See Also:

• JComponent.isValidateRoot()
• Container.isValidateRoot()

isOptimizedDrawingEnabled

public boolean isOptimizedDrawingEnabled()

The glassPane and contentPane have the same bounds, which means JRootPane does not tiles its children and this should return false. On the other hand, the glassPane is normally not visible, and so this can return true if the glassPane isn't visible. Therefore, the return value here depends upon the visibility of the glassPane.

Overrides:

isOptimizedDrawingEnabled in class JComponent

Returns:

true if this component's children don't overlap

setDefaultButton

@BeanProperty(description="The button activated by default in this root pane")
public void setDefaultButton(JButton defaultButton)

Sets the defaultButton property, which determines the current default button for this JRootPane. The default button is the button which will be activated when a UI-defined activation event (typically the Enter key) occurs in the root pane regardless of whether or not the button has keyboard focus (unless there is another component within the root pane which consumes the activation event, such as a JTextPane). For default activation to work, the button must be an enabled descendent of the root pane when activation occurs. To remove a default button from this root pane, set this property to null.

Parameters:

defaultButton - the JButton which is to be the default button

See Also:

• JButton.isDefaultButton()

getDefaultButton

public JButton getDefaultButton()

Returns the value of the defaultButton property.

Returns:

the JButton which is currently the default button

See Also:

• setDefaultButton(JButton)

addImpl

protected void addImpl(Component comp,
 Object constraints,
 int index)

Overridden to enforce the position of the glass component as the zero child.

Overrides:

addImpl in class Container

Parameters:

comp - the component to be enhanced

constraints - the constraints to be respected

index - the index

See Also:

• Container.add(Component)
• Container.add(Component, int)
• Container.add(Component, java.lang.Object)
• Container.invalidate()
• LayoutManager
• LayoutManager2

paramString

protected String paramString()

Returns a string representation of this JRootPane. 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 JRootPane.

getAccessibleContext

public AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this JRootPane. For root panes, the AccessibleContext takes the form of an AccessibleJRootPane. A new AccessibleJRootPane instance is created if necessary.

Specified by:

getAccessibleContext in interface Accessible

Overrides:

getAccessibleContext in class Component

Returns:

an AccessibleJRootPane that serves as the AccessibleContext of this JRootPane