java.awt
Class Panel

java.lang.Object
  java.awt.Component
      java.awt.Container
          java.awt.Panel

All Implemented Interfaces:

javax.accessibility.Accessible, ImageObserver, MenuContainer, Serializable

Direct Known Subclasses:

java.applet.Applet

public class Panel

extends Container

implements javax.accessibility.Accessible

Panel is the simplest container class. A panel provides space in which an application can attach any other component, including other panels.

The default layout manager for a panel is the FlowLayout layout manager.

Since:

JDK1.0

Author:

Sami Shaio

See Also:

FlowLayout, Serialized Form

Nested Class Summary

protected class

Panel.AccessibleAWTPanel This class implements accessibility support for the Panel class.

Nested classes inherited from class java.awt.Container

Container.AccessibleAWTContainer, Container.DropTargetEventTargetFilter, Container.EventTargetFilter, Container.MouseEventTargetFilter

Nested classes inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.AWTTreeLock, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

private static String	base
private static int	nameCounter
private static long	serialVersionUID

Fields inherited from class java.awt.Container

component, containerListener, descendantsCount, INCLUDE_SELF, layoutMgr, listeningBoundsChildren, listeningChildren, ncomponents, SEARCH_HEAVYWEIGHTS

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

Fields inherited from interface java.awt.image.ImageObserver

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

Constructor Summary

Panel()
Creates a new panel using the default layout manager.

Panel(LayoutManager layout)
Creates a new panel with the specified layout manager.

Method Summary

void	addNotify() Creates the Panel's peer.
(package private) String	constructComponentName() Construct a name for this component.
javax.accessibility.AccessibleContext	getAccessibleContext() Gets the AccessibleContext associated with this Panel.

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, adjustDecendantsOnParent, adjustDescendants, adjustListeningChildren, applyComponentOrientation, areFocusTraversalKeysSet, checkGD, clearCurrentFocusCycleRootOnHide, clearMostRecentFocusOwnerOnHide, containsFocus, countComponents, countHierarchyMembers, createChildHierarchyEvents, createHierarchyEvents, deliverEvent, dispatchEventImpl, dispatchEventToSelf, doLayout, eventEnabled, findComponentAt, findComponentAt, findComponentAt, getAccessibleAt, getAccessibleChild, getAccessibleChildrenCount, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents_NoClientCode, getComponents, getContainerListeners, getDropTargetEventTarget, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getMouseEventTarget, getPreferredSize, initializeFocusTraversalKeys, insets, invalidate, invalidateTree, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, isParentOf, layout, lightweightPaint, lightweightPrint, list, list, locate, minimumSize, nextFocusHelper, numListening, paint, paintComponents, paintHeavyweightComponents, paramString, postProcessKeyEvent, postsOldMouseEvents, preferredSize, preProcessKeyEvent, print, printComponents, printHeavyweightComponents, processContainerEvent, processEvent, proxyEnableEvents, remove, remove, removeAll, removeContainerListener, removeNotify, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFont, setLayout, setZOrder, transferFocusBackward, transferFocusDownCycle, update, validate, validateTree

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, contains, contains, createBufferStrategy, createBufferStrategy, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, dispatchMouseWheelToAncestor, enable, enable, enableEvents, enableInputMethods, eventTypeEnabled, firePropertyChange, firePropertyChange, firePropertyChange, 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, size, toString, transferFocus, transferFocusUpCycle, updateCursorImmediately

Methods inherited from class java.lang.Object

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

Field Detail

base

private static final String base

See Also:

Constant Field Values

nameCounter

private static int nameCounter

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

Panel

public Panel()

Creates a new panel using the default layout manager. The default layout manager for all panels is the FlowLayout class.

Panel

public Panel(LayoutManager layout)

Creates a new panel with the specified layout manager.

Parameters:

layout - the layout manager for this panel.

Since:

JDK1.1

Method Detail

constructComponentName

String constructComponentName()

Construct a name for this component. Called by getName() when the name is null.

Overrides:

constructComponentName in class Component

addNotify

public void addNotify()

Creates the Panel's peer. The peer allows you to modify the appearance of the panel without changing its functionality.

Overrides:

addNotify in class Container

See Also:

Component.isDisplayable(), Container.removeNotify()

getAccessibleContext

public javax.accessibility.AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this Panel. For panels, the AccessibleContext takes the form of an AccessibleAWTPanel. A new AccessibleAWTPanel instance is created if necessary.

Specified by:

getAccessibleContext in interface javax.accessibility.Accessible

Overrides:

getAccessibleContext in class Component

Returns:

an AccessibleAWTPanel that serves as the AccessibleContext of this Panel