java.awt
Class Container

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container

All Implemented Interfaces:

java.awt.image.ImageObserver, MenuContainer, Serializable

Direct Known Subclasses:

CellRendererPane, javax.swing.text.ComponentView.Invalidator, JComponent, Panel, ScrollPane, Window

public class Container

extends Component

Safe: A generic Abstract Window Toolkit(AWT) container object is a component that can contain other AWT components.

Components added to a container are tracked in a list. The order of the list will define the components' front-to-back stacking order within the container. If no index is specified when adding a component to a container, it will be added to the end of the list (and hence to the bottom of the stacking order).

Since:

JDK1.0

Version:

1.229, 04/02/02

Author:

Arthur van Hoff, Sami Shaio

See Also:

add(java.awt.Component, int), getComponent(int), LayoutManager, Serialized Form

Field Summary

(package private) Component[]	component The components in this container.
(package private) ContainerListener	containerListener
private int	containerSerializedDataVersion Container Serial Data Version.
private static sun.awt.DebugHelper	dbg
(package private) int	descendantsCount
private LightweightDispatcher	dispatcher Event router for lightweight components.
private boolean	focusCycleRoot Indicates whether this Component is the root of a focus traversal cycle.
private FocusTraversalPolicy	focusTraversalPolicy The focus traversal policy that will manage keyboard traversal of this Container's children, if this Container is a focus cycle root.
(package private) static boolean	INCLUDE_SELF A constant which toggles one of the controllable behaviors of getMouseEventTarget.
(package private) LayoutManager	layoutMgr Layout manager for this container.
(package private) int	listeningBoundsChildren
(package private) int	listeningChildren
private Dimension	maxSize
(package private) int	ncomponents The number of components in this container.
private boolean	printing
private Set	printingThreads
(package private) static boolean	SEARCH_HEAVYWEIGHTS A constant which toggles one of the controllable behaviors of getMouseEventTarget.
private static long	serialVersionUID JDK 1.1 serialVersionUID

Fields inherited from class java.awt.Component

accessibleContext, actionListenerK, adjustmentListenerK, appContext, background, BOTTOM_ALIGNMENT, bufferStrategy, CENTER_ALIGNMENT, componentListener, componentListenerK, componentOrientation, containerListenerK, cursor, dropTarget, enabled, eventMask, focusListener, focusListenerK, focusTraversalKeys, font, foreground, graphicsConfig, height, hierarchyBoundsListener, hierarchyBoundsListenerK, hierarchyListener, hierarchyListenerK, ignoreRepaint, incRate, inputMethodListener, inputMethodListenerK, isInc, isPacked, itemListenerK, keyListener, keyListenerK, LEFT_ALIGNMENT, locale, LOCK, metrics, minSize, mouseListener, mouseListenerK, mouseMotionListener, mouseMotionListenerK, mouseWheelListener, mouseWheelListenerK, newEventsOnly, ownedWindowK, parent, peer, peerFont, popups, prefSize, RIGHT_ALIGNMENT, textListenerK, TOP_ALIGNMENT, valid, visible, width, windowClosingException, windowFocusListenerK, windowListenerK, windowStateListenerK, x, y

Constructor Summary

Container()
Suppressed: Constructs a new Container.

Method Summary

Component	add(Component comp) Enabled: Appends the specified component to the end of this container.
Component	add(Component comp, int index) Enabled: Adds the specified component to this container at the given position.
void	add(Component comp, Object constraints) Enabled: Adds the specified component to the end of this container.
void	add(Component comp, Object constraints, int index) Enabled: Adds the specified component to this container with the specified constraints at the specified index.
Component	add(String name, Component comp) Suppressed: Adds the specified component to this container.
void	addContainerListener(ContainerListener l) Enabled: Adds the specified container listener to receive container events from this container.
protected void	addImpl(Component comp, Object constraints, int index) Adds the specified component to this container at the specified index.
void	addNotify() Suppressed: Makes this Container displayable by connecting it to a native screen resource.
void	addPropertyChangeListener(java.beans.PropertyChangeListener listener) Suppressed: Adds a PropertyChangeListener to the listener list.
void	addPropertyChangeListener(String propertyName, java.beans.PropertyChangeListener listener) Suppressed: Adds a PropertyChangeListener to the listener list for a specific property.
(package private) void	adjustDecendantsOnParent(int num)
(package private) void	adjustDescendants(int num)
(package private) void	adjustListeningChildren(long mask, int num)
void	applyComponentOrientation(ComponentOrientation o) Suppressed: Sets the ComponentOrientation property of this container and all components contained within it.
boolean	areFocusTraversalKeysSet(int id) Suppressed: Returns whether the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Container.
(package private) void	checkGD(String stringID) Checks that all Components that this Container contains are on the same GraphicsDevice as this Container.
(package private) void	clearCurrentFocusCycleRootOnHide()
(package private) void	clearMostRecentFocusOwnerOnHide()
(package private) boolean	containsFocus()
int	countComponents() Deprecated. As of JDK version 1.1, replaced by getComponentCount().
(package private) int	countHierarchyMembers()
(package private) void	createChildHierarchyEvents(int id, long changeFlags, boolean enabledOnToolkit)
(package private) int	createHierarchyEvents(int id, Component changed, Container changedParent, long changeFlags, boolean enabledOnToolkit)
void	deliverEvent(Event e) Suppressed: @deprecated As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e)
(package private) void	dispatchEventImpl(AWTEvent e)
(package private) void	dispatchEventToSelf(AWTEvent e)
void	doLayout() Suppressed: Causes this container to lay out its components.
(package private) boolean	eventEnabled(AWTEvent e)
Component	findComponentAt(int x, int y) Enabled: Locates the visible child component that contains the specified position.
(package private) Component	findComponentAt(int x, int y, boolean ignoreEnabled) Private version of findComponentAt which has a controllable behavior.
Component	findComponentAt(Point p) Suppressed: Locates the visible child component that contains the specified point.
private Container	findTraversalRoot()
Component	get(int n) Added: So container[n] will work in E.
(package private) Accessible	getAccessibleAt(Point p) Returns the Accessible child contained at the local coordinate Point, if one exists.
(package private) Accessible	getAccessibleChild(int i) Returns the nth Accessible child of the object.
(package private) int	getAccessibleChildrenCount() Returns the number of accessible children in the object.
float	getAlignmentX() Enabled: Returns the alignment along the x axis.
float	getAlignmentY() Enabled: Returns the alignment along the y axis.
Component	getComponent(int n) Enabled: Gets the nth component in this container.
Component	getComponentAt(int x, int y) Enabled: Locates the component that contains the x,y position.
Component	getComponentAt(Point p) Suppressed: Gets the component that contains the specified point.
int	getComponentCount() Enabled: Gets the number of components in this panel.
(package private) Component[]	getComponents_NoClientCode()
Component[]	getComponents() Enabled: Gets all the components in this container.
ContainerListener[]	getContainerListeners() Suppressed: Returns an array of all the container listeners registered on this container.
(package private) Component	getDropTargetEventTarget(int x, int y, boolean includeSelf) Fetches the top-most (deepest) component to receive SunDropTargetEvents.
Set	getFocusTraversalKeys(int id) Suppressed: Returns the Set of focus traversal keys for a given traversal operation for this Container.
FocusTraversalPolicy	getFocusTraversalPolicy() Suppressed: 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.
Insets	getInsets() Enabled: Determines the insets of this container, which indicate the size of the container's border.
LayoutManager	getLayout() Enabled: Gets the layout manager for this container.
EventListener[]	getListeners(Class listenerType) Suppressed: Returns an array of all the objects currently registered as FooListeners upon this Container.
Dimension	getMaximumSize() Enabled: Returns the maximum size of this container.
Dimension	getMinimumSize() Enabled: Returns the minimum size of this container.
(package private) Component	getMouseEventTarget(int x, int y, boolean includeSelf) Fetchs the top-most (deepest) lightweight component that is interested in receiving mouse events.
private Component	getMouseEventTarget(int x, int y, boolean includeSelf, java.awt.Container.EventTargetFilter filter, boolean searchHeavyweights) A private version of getMouseEventTarget which has two additional controllable behaviors.
private Component	getMouseEventTargetImpl(int x, int y, boolean includeSelf, java.awt.Container.EventTargetFilter filter, boolean searchHeavyweightChildren, boolean searchHeavyweightDescendants) A private version of getMouseEventTarget which has three additional controllable behaviors.
Dimension	getPreferredSize() Enabled: Returns the preferred size of this container.
(package private) void	initializeFocusTraversalKeys()
private static void	initIDs() Initialize JNI field and method IDs for fields that may be called from C.
Insets	insets() Suppressed: @deprecated As of JDK version 1.1, replaced by getInsets().
void	invalidate() Enabled: Invalidates the container.
(package private) void	invalidateTree() Recursively descends the container tree and invalidates all contained components.
boolean	isAncestorOf(Component c) Enabled: Checks if the component is contained in the component hierarchy of this container.
boolean	isFocusCycleRoot() Suppressed: Returns whether this Container is the root of a focus traversal cycle.
boolean	isFocusCycleRoot(Container container) Suppressed: Returns whether the specified Container is the focus cycle root of this Container's focus traversal cycle.
boolean	isFocusTraversalPolicySet() Suppressed: Returns whether the focus traversal policy has been explicitly set for this Container.
void	iterate(AssocFunc func) Added: A Container enumerates its components
void	layout() Deprecated. As of JDK version 1.1, replaced by doLayout().
(package private) void	lightweightPaint(Graphics g) Simulates the peer callbacks into java.awt for printing of lightweight Containers.
(package private) void	lightweightPrint(Graphics g) Simulates the peer callbacks into java.awt for printing of lightweight Containers.
void	list(PrintStream out, int indent) Suppressed: Prints a listing of this container to the specified output stream.
void	list(PrintWriter out, int indent) Suppressed: Prints out a list, starting at the specified indention, to the specified print writer.
Component	locate(int x, int y) Suppressed: @deprecated As of JDK version 1.1, replaced by getComponentAt(int, int).
Dimension	minimumSize() Deprecated. As of JDK version 1.1, replaced by getMinimumSize().
(package private) boolean	nextFocusHelper()
(package private) int	numListening(long mask)
void	paint(Graphics g) Suppressed: Paints the container.
void	paintComponents(Graphics g) Suppressed: Paints each of the components in this container.
(package private) void	paintHeavyweightComponents(Graphics g) Prints all the heavyweight subcomponents.
protected String	paramString() Returns a string representing the state of this Container.
(package private) void	postProcessKeyEvent(KeyEvent e)
(package private) boolean	postsOldMouseEvents()
Dimension	preferredSize() Deprecated. As of JDK version 1.1, replaced by getPreferredSize().
(package private) void	preProcessKeyEvent(KeyEvent e)
void	print(Graphics g) Suppressed: Prints the container.
void	printComponents(Graphics g) Suppressed: Prints each of the components in this container.
(package private) void	printHeavyweightComponents(Graphics g) Prints all the heavyweight subcomponents.
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.
(package private) void	proxyEnableEvents(long events) This is called by lightweight components that want the containing windowed parent to enable some kind of events on their behalf.
private void	readObject(ObjectInputStream s) Deserializes this Container from the specified ObjectInputStream.
void	remove(Component comp) Enabled: Removes the specified component from this container.
void	remove(int index) Enabled: Removes the component, specified by index, from this container.
void	removeAll() Enabled: Removes all the components from this container.
void	removeContainerListener(ContainerListener l) Enabled: Removes the specified container listener so it no longer receives container events from this container.
void	removeNotify() Suppressed: Makes this Container undisplayable by removing its connection to its native screen resource.
void	setFocusCycleRoot(boolean focusCycleRoot) Suppressed: Sets whether this Container is the root of a focus traversal cycle.
void	setFocusTraversalKeys(int id, Set keystrokes) Suppressed: Sets the focus traversal keys for a given traversal operation for this Container.
void	setFocusTraversalPolicy(FocusTraversalPolicy policy) Suppressed: Sets the focus traversal policy that will manage keyboard traversal of this Container's children, if this Container is a focus cycle root.
void	setFont(Font f) Enabled: Sets the font of this container.
void	setLayout(LayoutManager mgr) Enabled: Sets the layout manager for this container.
(package private) void	setZOrder(Component comp, int index)
int	size() Added: An unfortunate ambiguity.
void	transferFocusBackward() Suppressed:
void	transferFocusDownCycle() Suppressed: Transfers the focus down one focus traversal cycle.
void	update(Graphics g) Enabled: Updates the container.
void	validate() Suppressed: 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).
private void	writeObject(ObjectOutputStream s) Serializes this Container to the specified ObjectOutputStream.

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, adjustListeningChildrenOnParent, areInputMethodsEnabled, autoProcessMouseWheel, autoTransferFocus, bounds, checkImage, checkImage, checkWindowClosingException, coalesceEvents, constructComponentName, contains, contains, createBufferStrategy, createBufferStrategy, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, dispatchMouseWheelToAncestor, enable, enable, enableEvents, enableInputMethods, eventTypeEnabled, firePropertyChange, firePropertyChange, firePropertyChange, getAccessibleContext, getAccessibleIndexInParent, getAccessibleStateSet, getBackBuffer, getBackground, getBounds, getBounds, getBufferStrategy, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys_NoIDCheck, getFocusTraversalKeysEnabled, getFont_NoClientCode, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocation, getLocationOnScreen_NoTreeLock, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getNativeContainer, getParent_NoClientCode, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getToolkitImpl, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isEnabledImpl, isFocusable, isFocusOwner, isFocusTraversable, isFocusTraversableOverridden, isFontSet, isForegroundSet, isLightweight, isOpaque, isRecursivelyVisible, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusHelper, requestFocusInWindow, requestFocusInWindow, resetGC, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys_NoIDCheck, setFocusTraversalKeysEnabled, setForeground, setGCFromPeer, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, toString, transferFocus, transferFocus, transferFocusUpCycle, updateCursorImmediately

Methods inherited from class java.lang.Object

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

Field Detail

ncomponents

int ncomponents

The number of components in this container. This value can be null.

See Also:

getComponent(int), getComponents(), getComponentCount()

component

Component[] component

The components in this container.

See Also:

add(java.awt.Component), getComponents()

layoutMgr

LayoutManager layoutMgr

Layout manager for this container.

See Also:

doLayout(), setLayout(java.awt.LayoutManager), getLayout()

dispatcher

private LightweightDispatcher dispatcher

Event router for lightweight components. If this container is native, this dispatcher takes care of forwarding and retargeting the events to lightweight components contained (if any).

maxSize

private Dimension maxSize

focusTraversalPolicy

private transient FocusTraversalPolicy focusTraversalPolicy

The focus traversal policy that will manage keyboard traversal of this Container's children, if this Container is a focus cycle root. If the value is null, this Container inherits its policy from its focus-cycle- root ancestor. If all such ancestors of this Container have null policies, then the current KeyboardFocusManager's default policy is used. If the value is non-null, this policy will be inherited by all focus-cycle-root children that have no keyboard-traversal policy of their own (as will, recursively, their focus-cycle-root children).

If this Container is not a focus cycle root, the value will be remembered, but will not be used or inherited by this or any other Containers until this Container is made a focus cycle root.

Since:

1.4

See Also:

setFocusTraversalPolicy(java.awt.FocusTraversalPolicy), getFocusTraversalPolicy()

focusCycleRoot

private boolean focusCycleRoot

Indicates whether this Component is the root of a focus traversal cycle. Once focus enters a traversal cycle, typically it cannot leave it via focus traversal unless one of the up- or down-cycle keys is pressed. Normal traversal is limited to this Container, and all of this Container's descendants that are not descendants of inferior focus cycle roots.

Since:

1.4

See Also:

setFocusCycleRoot(boolean), isFocusCycleRoot(java.awt.Container)

printingThreads

private transient Set printingThreads

printing

private transient boolean printing

containerListener

transient ContainerListener containerListener

listeningChildren

transient int listeningChildren

listeningBoundsChildren

transient int listeningBoundsChildren

descendantsCount

transient int descendantsCount

serialVersionUID

private static final long serialVersionUID

JDK 1.1 serialVersionUID

dbg

private static final sun.awt.DebugHelper dbg

INCLUDE_SELF

static final boolean INCLUDE_SELF

A constant which toggles one of the controllable behaviors of getMouseEventTarget. It is used to specify whether the method can return the Container on which it is originally called in case if none of its children are the current mouse event targets.

See Also:

#getMouseEventTarget(int, int, boolean, boolean, boolean)

SEARCH_HEAVYWEIGHTS

static final boolean SEARCH_HEAVYWEIGHTS

A constant which toggles one of the controllable behaviors of getMouseEventTarget. It is used to specify whether the method should search only lightweight components.

See Also:

#getMouseEventTarget(int, int, boolean, boolean, boolean)

containerSerializedDataVersion

private int containerSerializedDataVersion

Container Serial Data Version.

Constructor Detail

Container

public Container()

Suppressed: Constructs a new Container. Containers can be extended directly, but are lightweight in this case and must be contained by a parent somewhere higher up in the component tree that is native. (such as Frame for example).

Method Detail

initIDs

private static void initIDs()

Initialize JNI field and method IDs for fields that may be called from C.

initializeFocusTraversalKeys

void initializeFocusTraversalKeys()

Overrides:

initializeFocusTraversalKeys in class Component

getComponentCount

public int getComponentCount()

Enabled: Gets the number of components in this panel.

Returns:

the number of components in this panel.

Since:

JDK1.1

See Also:

getComponent(int)

countComponents

public int countComponents()

Deprecated. As of JDK version 1.1, replaced by getComponentCount().

Suppressed:

getComponent

public Component getComponent(int n)

Enabled: Gets the nth component in this container.

Parameters:

n - the index of the component to get.

Returns:

the n^th component in this container.

getComponents

public Component[] getComponents()

Enabled: Gets all the components in this container.

Returns:

an array of all the components in this container.

getComponents_NoClientCode

final Component[] getComponents_NoClientCode()

getInsets

public Insets getInsets()

Enabled: Determines the insets of this container, which indicate the size of the container's border.

A Frame object, for example, has a top inset that corresponds to the height of the frame's title bar.

Returns:

the insets of this container.

Since:

JDK1.1

See Also:

Insets, LayoutManager

insets

public Insets insets()

Suppressed: @deprecated As of JDK version 1.1, replaced by getInsets().

add

public Component add(Component comp)

Enabled: Appends the specified component to the end of this container. This is a convenience method for addImpl(java.awt.Component, java.lang.Object, int).

Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.

Parameters:

comp - the component to be added

Returns:

the component argument

See Also:

addImpl(java.awt.Component, java.lang.Object, int), validate(), #revalidate

add

public Component add(String name,
                     Component comp)

Suppressed: Adds the specified component to this container. This is a convenience method for addImpl(java.awt.Component, java.lang.Object, int).

This method is obsolete as of 1.1. Please use the method add(Component, Object) instead.

See Also:

add(Component, Object)

add

public Component add(Component comp,
                     int index)

Enabled: Adds the specified component to this container at the given position. This is a convenience method for addImpl(java.awt.Component, java.lang.Object, int).

Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.

Parameters:

comp - the component to be added

index - the position at which to insert the component, or -1 to append the component to the end

Returns:

the component comp

See Also:

addImpl(java.awt.Component, java.lang.Object, int), remove(int), validate(), #revalidate

setZOrder

void setZOrder(Component comp,
               int index)

add

public void add(Component comp,
                Object constraints)

Enabled: Adds the specified component to the end of this container. Also notifies the layout manager to add the component to this container's layout using the specified constraints object. This is a convenience method for addImpl(java.awt.Component, java.lang.Object, int).

Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.

Parameters:

comp - the component to be added

constraints - an object expressing layout contraints for this component

Since:

JDK1.1

See Also:

addImpl(java.awt.Component, java.lang.Object, int), validate(), #revalidate, LayoutManager

add

public void add(Component comp,
                Object constraints,
                int index)

Enabled: Adds the specified component to this container with the specified constraints at the specified index. Also notifies the layout manager to add the component to the this container's layout using the specified constraints object. This is a convenience method for addImpl(java.awt.Component, java.lang.Object, int).

Note: If a component has been added to a container that has been displayed, validate must be called on that container to display the new component. If multiple components are being added, you can improve efficiency by calling validate only once, after all the components have been added.

Parameters:

comp - the component to be added

constraints - an object expressing layout contraints for this

index - the position in the container's list at which to insert the component; -1 means insert at the end component

See Also:

addImpl(java.awt.Component, java.lang.Object, int), validate(), #revalidate, remove(int), LayoutManager

addImpl

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

Adds the specified component to this container at the specified index. This method also notifies the layout manager to add the component to this container's layout using the specified constraints object via the addLayoutComponent method. The constraints are defined by the particular layout manager being used. For example, the BorderLayout class defines five constraints: BorderLayout.NORTH, BorderLayout.SOUTH, BorderLayout.EAST, BorderLayout.WEST, and BorderLayout.CENTER.

Note that if the component already exists in this container or a child of this container, it is removed from that container before being added to this container.

This is the method to override if a program needs to track every add request to a container as all other add methods defer to this one. An overriding method should usually include a call to the superclass's version of the method:

super.addImpl(comp, constraints, index)

Parameters:

comp - the component to be added

constraints - an object expressing layout constraints for this component

index - the position in the container's list at which to insert the component, where -1 means append to the end

Since:

JDK1.1

See Also:

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

checkGD

void checkGD(String stringID)

Checks that all Components that this Container contains are on the same GraphicsDevice as this Container. If not, throws an IllegalArgumentException.

Overrides:

checkGD in class Component

remove

public void remove(int index)

Enabled: Removes the component, specified by index, from this container.

Parameters:

index - the index of the component to be removed.

Since:

JDK1.1

See Also:

add(java.awt.Component)

remove

public void remove(Component comp)

Enabled: Removes the specified component from this container.

Parameters:

comp - the component to be removed

See Also:

add(java.awt.Component)

removeAll

public void removeAll()

Enabled: Removes all the components from this container.

See Also:

add(java.awt.Component), remove(int)

numListening

int numListening(long mask)

Overrides:

numListening in class Component

adjustListeningChildren

void adjustListeningChildren(long mask,
                             int num)

adjustDescendants

void adjustDescendants(int num)

adjustDecendantsOnParent

void adjustDecendantsOnParent(int num)

countHierarchyMembers

int countHierarchyMembers()

Overrides:

countHierarchyMembers in class Component

createHierarchyEvents

int createHierarchyEvents(int id,
                          Component changed,
                          Container changedParent,
                          long changeFlags,
                          boolean enabledOnToolkit)

Overrides:

createHierarchyEvents in class Component

createChildHierarchyEvents

void createChildHierarchyEvents(int id,
                                long changeFlags,
                                boolean enabledOnToolkit)

Overrides:

createChildHierarchyEvents in class Component

getLayout

public LayoutManager getLayout()

Enabled: Gets the layout manager for this container.

See Also:

doLayout(), setLayout(java.awt.LayoutManager)

setLayout

public void setLayout(LayoutManager mgr)

Enabled: Sets the layout manager for this container.

Parameters:

mgr - the specified layout manager

See Also:

doLayout(), getLayout()

doLayout

public void doLayout()

Suppressed: Causes this container to lay out its components. Most programs should not call this method directly, but should invoke the validate method instead.

Overrides:

doLayout in class Component

Since:

JDK1.1

See Also:

LayoutManager.layoutContainer(java.awt.Container), setLayout(java.awt.LayoutManager), validate()

layout

public void layout()

Deprecated. As of JDK version 1.1, replaced by doLayout().

Suppressed:

Overrides:

layout in class Component

invalidate

public void invalidate()

Enabled: Invalidates the container. The container and all parents above it are marked as needing to be laid out. This method can be called often, so it needs to execute quickly.

Overrides:

invalidate in class Component

See Also:

validate(), layout(), LayoutManager

validate

public void validate()

Suppressed: Validates this container and all of its subcomponents.

The validate method is used to cause a container to lay out its subcomponents again. It should be invoked when this container's subcomponents are modified (added to or removed from the container, or layout-related information changed) after the container has been displayed.

Overrides:

validate in class Component

See Also:

add(java.awt.Component), Component.invalidate(), #revalidate

validateTree

protected void validateTree()

Recursively descends the container t