java.awt
Class Canvas

java.lang.Object   
  java.awt.Component   
      java.awt.Canvas

All Implemented Interfaces:

ImageObserver , MenuContainer , Serializable , Accessible

public class Canvas
extends Component   
implements Accessible   

A Canvas component represents a blank rectangular area of the screen onto which the application can draw or from which the application can trap input events from the user.

An application must subclass the Canvas class in order to get useful functionality such as creating a custom component. The paint method must be overridden in order to perform custom graphics on the canvas.

Since:

JDK1.0

See Also:

Serialized Form

Nested Class Summary

protected class

Canvas.AccessibleAWTCanvas This class implements accessibility support for the Canvas class.

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent , Component.BltBufferStrategy , Component.FlipBufferStrategy

Field Summary

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT , CENTER_ALIGNMENT , LEFT_ALIGNMENT , RIGHT_ALIGNMENT , TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

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

Constructor Summary

Canvas ()
Constructs a new Canvas.

Canvas (GraphicsConfiguration config)
Constructs a new Canvas given a GraphicsConfiguration object.

Method Summary

void	addNotify () Creates the peer of the canvas.
void	createBufferStrategy (int numBuffers) Creates a new strategy for multi-buffering on this component.
void	createBufferStrategy (int numBuffers, BufferCapabilities caps) Creates a new strategy for multi-buffering on this component with the required buffer capabilities.
AccessibleContext	getAccessibleContext () Gets the AccessibleContext associated with this Canvas.
BufferStrategy	getBufferStrategy ()
void	paint (Graphics g) Paints this canvas.
void	update (Graphics g) Updates this canvas.

Methods inherited from class java.awt.Component

action , add , addComponentListener , addFocusListener , addHierarchyBoundsListener , addHierarchyListener , addInputMethodListener , addKeyListener , addMouseListener , addMouseMotionListener , addMouseWheelListener , addPropertyChangeListener , addPropertyChangeListener , applyComponentOrientation , areFocusTraversalKeysSet , bounds , checkImage , checkImage , coalesceEvents , contains , contains , createImage , createImage , createVolatileImage , createVolatileImage , deliverEvent , disable , disableEvents , dispatchEvent , doLayout , enable , enable , enableEvents , enableInputMethods , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , getAlignmentX , getAlignmentY , getBackground , getBounds , getBounds , getColorModel , getComponentAt , getComponentAt , getComponentListeners , getComponentOrientation , getCursor , getDropTarget , getFocusCycleRootAncestor , getFocusListeners , getFocusTraversalKeys , getFocusTraversalKeysEnabled , getFont , getFontMetrics , getForeground , getGraphics , getGraphicsConfiguration , getHeight , getHierarchyBoundsListeners , getHierarchyListeners , getIgnoreRepaint , getInputContext , getInputMethodListeners , getInputMethodRequests , getKeyListeners , getListeners , getLocale , getLocation , getLocation , getLocationOnScreen , getMaximumSize , getMinimumSize , getMouseListeners , getMouseMotionListeners , getMousePosition , getMouseWheelListeners , getName , getParent , getPeer , getPreferredSize , getPropertyChangeListeners , getPropertyChangeListeners , getSize , getSize , getToolkit , getTreeLock , getWidth , getX , getY , gotFocus , handleEvent , hasFocus , hide , imageUpdate , inside , invalidate , isBackgroundSet , isCursorSet , isDisplayable , isDoubleBuffered , isEnabled , isFocusable , isFocusCycleRoot , isFocusOwner , isFocusTraversable , isFontSet , isForegroundSet , isLightweight , isMaximumSizeSet , isMinimumSizeSet , isOpaque , isPreferredSizeSet , isShowing , isValid , isVisible , keyDown , keyUp , layout , list , list , list , list , list