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Class java.awt.Graphics

java.lang.Object
   |
   +----java.awt.Graphics

public abstract class Graphics

extends Object

A Graphics object encapsulates state information needed for the basic rendering operations that Java supports. This state information includes the following properties:

• The Component object on which to draw.
• A translation origin for rendering and clipping coordinates.
• The current clip.
• The current color.
• The current font.
• The current logical pixel operation function (XOR or Paint).
• The current XOR alternation color (see setXORMode).

Coordinates are infinitely thin and lie between the pixels of the output device. Operations which draw the outline of a figure operate by traversing an infinitely thin path between pixels with a pixel-sized pen that hangs down and to the right of the anchor point on the path. Operations which fill a figure operate by filling the interior of that infinitely thin path. Operations which render horizontal text render the ascending portion of character glyphs entirely above the baseline coordinate.

The graphics pen hangs down and to the right from the path it traverses. This has the following implications:

• If you draw a figure that covers a given rectangle, that figure occupies one extra row of pixels on the right and bottom edges as compared to filling a figure that is bounded by that same rectangle.
• If you draw a horizontal line along the same y coordinate as the baseline of a line of text, that line is drawn entirely below the text, except for any descenders.

All coordinates which appear as arguments to the methods of this Graphics object are considered relative to the translation origin of this Graphics object prior to the invocation of the method. All rendering operations modify only pixels which lie within the area bounded by both the current clip of the graphics context and the extents of the component used to create the Graphics object. All drawing or writing is done in the current color, using the current paint mode, and in the current font.

See Also:

Component, clipRect, setColor, setPaintMode, setXORMode, setFont

Graphics()

Constructs a new Graphics object.

clearRect(int, int, int, int)

Clears the specified rectangle by filling it with the background color of the current drawing surface.

clipRect(int, int, int, int)

Intersects the current clip with the specified rectangle.

copyArea(int, int, int, int, int, int)

Copies an area of the component by a distance specified by dx and dy.

create()

Creates a new Graphics object that is a copy of this Graphics object.

create(int, int, int, int)

Creates a new Graphics object based on this Graphics object, but with a new translation and clip area.

dispose()

Disposes of this graphics context and releases any system resources that it is using.

draw3DRect(int, int, int, int, boolean)

Draws a 3-D highlighted outline of the specified rectangle.

drawArc(int, int, int, int, int, int)

Draws the outline of a circular or elliptical arc covering the specified rectangle.

drawBytes(byte[], int, int, int, int)

Draws the text given by the specified byte array, using this graphics context's current font and color.

drawChars(char[], int, int, int, int)

Draws the text given by the specified character array, using this graphics context's current font and color.

drawImage(Image, int, int, Color, ImageObserver)

Draws as much of the specified image as is currently available.

drawImage(Image, int, int, ImageObserver)

Draws as much of the specified image as is currently available.

drawImage(Image, int, int, int, int, Color, ImageObserver)

Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.

drawImage(Image, int, int, int, int, ImageObserver)

Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.

drawImage(Image, int, int, int, int, int, int, int, int, Color, ImageObserver)

Draws as much of the specified area of the specified image as is currently available, scaling it on the fly to fit inside the specified area of the destination drawable surface.

drawImage(Image, int, int, int, int, int, int, int, int, ImageObserver)

Draws as much of the specified area of the specified image as is currently available, scaling it on the fly to fit inside the specified area of the destination drawable surface.

drawLine(int, int, int, int)

Draws a line, using the current color, between the points (x1, y1) and (x2, y2) in this graphics context's coordinate system.

drawOval(int, int, int, int)

Draws the outline of an oval.

drawPolygon(int[], int[], int)

Draws a closed polygon defined by arrays of x and y coordinates.

drawPolygon(Polygon)

Draws the outline of a polygon defined by the specified Polygon object.

drawPolyline(int[], int[], int)

Draws a sequence of connected lines defined by arrays of x and y coordinates.

drawRect(int, int, int, int)

Draws the outline of the specified rectangle.

drawRoundRect(int, int, int, int, int, int)

Draws an outlined round-cornered rectangle using this graphics context's current color.

drawString(String, int, int)

Draws the text given by the specified string, using this graphics context's current font and color.

fill3DRect(int, int, int, int, boolean)

Paints a 3-D highlighted rectangle filled with the current color.

fillArc(int, int, int, int, int, int)

Fills a circular or elliptical arc covering the specified rectangle.

fillOval(int, int, int, int)

Fills an oval bounded by the specified rectangle with the current color.

fillPolygon(int[], int[], int)

Fills a closed polygon defined by arrays of x and y coordinates.

fillPolygon(Polygon)

Fills the polygon defined by the specified Polygon object with the graphics context's current color.

fillRect(int, int, int, int)

Fills the specified rectangle.

fillRoundRect(int, int, int, int, int, int)

Fills the specified rounded corner rectangle with the current color.

finalize()

Disposes of this graphics context once it is no longer referenced.

getClip()

Gets the current clipping area.

getClipBounds()

Returns the bounding rectangle of the current clipping area.

getClipRect()

Deprecated.

getColor()

Gets this graphics context's current color.

getFont()

Gets the current font.

getFontMetrics()

Gets the font metrics of the current font.

getFontMetrics(Font)

Gets the font metrics for the specified font.

setClip(int, int, int, int)

Sets the current clip to the rectangle specified by the given coordinates.

setClip(Shape)

Sets the current clipping area to an arbitrary clip shape.

setColor(Color)

Sets this graphics context's current color to the specified color.

setFont(Font)

Sets this graphics context's font to the specified font.

setPaintMode()

Sets the paint mode of this graphics context to overwrite the destination with this graphics context's current color.

setXORMode(Color)

Sets the paint mode of this graphics context to alternate between this graphics context's current color and the new specified color.

toString()

Returns a String object representing this Graphics object's value.

translate(int, int)

Translates the origin of the graphics context to the point (x, y) in the current coordinate system.

 protected Graphics()

Constructs a new Graphics object. This constructor is the default contructor for a graphics context.

Since Graphics is an abstract class, applications cannot call this constructor directly. Graphics contexts are obtained from other graphics contexts or are created by calling getGraphics on a component.

See Also:

create, getGraphics

 public abstract Graphics create()

Creates a new Graphics object that is a copy of this Graphics object.

Returns:

a new graphics context that is a copy of this graphics context.

 public Graphics create(int x,
                        int y,
                        int width,
                        int height)

Creates a new Graphics object based on this Graphics object, but with a new translation and clip area. The new Graphics object has its origin translated to the specified point (x, y). Its clip area is determined by the intersection of the original clip area with the specified rectangle. The arguments are all interpreted in the coordinate system of the original Graphics object. The new graphics context is identical to the original, except in two respects:

• The new graphics context is translated by (x, y). That is to say, the point (0, 0) in the new graphics context is the same as (x, y) in the original graphics context.
• The new graphics context has an additional clipping rectangle, in addition to whatever (translated) clipping rectangle it inherited from the original graphics context. The origin of the new clipping rectangle is at (0, 0), and its size is specified by the width and height arguments.

Parameters:

x - the x coordinate.

y - the y coordinate.

width - the width of the clipping rectangle.

height - the height of the clipping rectangle.

Returns:

a new graphics context.

See Also:

translate, clipRect

 public abstract void translate(int x,
                                int y)

Translates the origin of the graphics context to the point (x, y) in the current coordinate system. Modifies this graphics context so that its new origin corresponds to the point (x, y) in this graphics context's original coordinate system. All coordinates used in subsequent rendering operations on this graphics context will be relative to this new origin.

Parameters:

x - the x coordinate.

y - the y coordinate.

 public abstract Color getColor()

Gets this graphics context's current color.

Returns:

this graphics context's current color.

See Also:

Color, setColor

 public abstract void setColor(Color c)

Sets this graphics context's current color to the specified color. All subsequent graphics operations using this graphics context use this specified color.

Parameters:

c - the new rendering color.

See Also:

Color, getColor

 public abstract void setPaintMode()

Sets the paint mode of this graphics context to overwrite the destination with this graphics context's current color. This sets the logical pixel operation function to the paint or overwrite mode. All subsequent rendering operations will overwrite the destination with the current color.

 public abstract void setXORMode(Color c1)

Sets the paint mode of this graphics context to alternate between this graphics context's current color and the new specified color. This specifies that logical pixel operations are performed in the XOR mode, which alternates pixels between the current color and a specified XOR color.

When drawing operations are performed, pixels which are the current color are changed to the specified color, and vice versa.

Pixels that are of colors other than those two colors are changed in an unpredictable but reversible manner; if the same figure is drawn twice, then all pixels are restored to their original values.

Parameters:

c1 - the XOR alternation color

 public abstract Font getFont()

Gets the current font.

Returns:

this graphics context's current font.

See Also:

Font, setFont

 public abstract void setFont(Font font)

Sets this graphics context's font to the specified font. All subsequent text operations using this graphics context use this font.

Parameters:

font - the font.

See Also:

getFont, drawChars, drawString, drawBytes

 public FontMetrics getFontMetrics()

Gets the font metrics of the current font.

Returns:

the font metrics of this graphics context's current font.

See Also:

getFont, FontMetrics, getFontMetrics

 public abstract FontMetrics getFontMetrics(Font f)

Gets the font metrics for the specified font.

Parameters:

f - the specified font

Returns:

the font metrics for the specified font.

See Also:

getFont, FontMetrics, getFontMetrics

 public abstract Rectangle getClipBounds()

Returns the bounding rectangle of the current clipping area. The coordinates in the rectangle are relative to the coordinate system origin of this graphics context.

Returns:

the bounding rectangle of the current clipping area.

See Also:

getClip, clipRect, setClip, setClip

 public abstract void clipRect(int x,
                               int y,
                               int width,
                               int height)

Intersects the current clip with the specified rectangle. The resulting clipping area is the intersection of the current clipping area and the specified rectangle. This method can only be used to make the current clip smaller. To set the current clip larger, use any of the setClip methods. Rendering operations have no effect outside of the clipping area.

Parameters:

x - the x coordinate of the rectangle to intersect the clip with

y - the y coordinate of the rectangle to intersect the clip with

width - the width of the rectangle to intersect the clip with

height - the height of the rectangle to intersect the clip with

See Also:

setClip, setClip

 public abstract void setClip(int x,
                              int y,
                              int width,
                              int height)

Sets the current clip to the rectangle specified by the given coordinates. Rendering operations have no effect outside of the clipping area.

Parameters:

x - the x coordinate of the new clip rectangle.

y - the y coordinate of the new clip rectangle.

width - the width of the new clip rectangle.

height - the height of the new clip rectangle.

See Also:

clipRect, setClip

 public abstract Shape getClip()

Gets the current clipping area.

Returns:

a Shape object representing the current clipping area.

See Also:

getClipBounds, clipRect, setClip, setClip

 public abstract void setClip(Shape clip)

Sets the current clipping area to an arbitrary clip shape. Not all objects which implement the Shape interface can be used to set the clip. The only Shape objects which are guaranteed to be supported are Shape objects which are obtained via the getClip method and via Rectangle objects.

See Also:

getClip, clipRect, setClip

 public abstract void copyArea(int x,
                               int y,
                               int width,
                               int height,
                               int dx,
                               int dy)

Copies an area of the component by a distance specified by dx and dy. From the point specified by x and y, this method copies downwards and to the right. To copy an area of the component to the left or upwards, specify a negative value for dx or dy. If a portion of the source rectangle lies outside the bounds of the component, or is obscured by another window or component, copyArea will be unable to copy the associated pixels. The area that is omitted can be refreshed by calling the component's paint method.

Parameters:

x - the x coordinate of the source rectangle.

y - the y coordinate of the source rectangle.

width - the width of the source rectangle.

height - the height of the source rectangle.

dx - the horizontal distance to copy the pixels.

dy - the vertical distance to copy the pixels.

 public abstract void drawLine(int x1,
                               int y1,
                               int x2,
                               int y2)

Draws a line, using the current color, between the points (x1, y1) and (x2, y2) in this graphics context's coordinate system.

Parameters:

x1 - the first point's x coordinate.

y1 - the first point's y coordinate.

x2 - the second point's x coordinate.

y2 - the second point's y coordinate.

 public abstract void fillRect(int x,
                               int y,
                               int width,
                               int height)

Fills the specified rectangle. The left and right edges of the rectangle are at x and x + width - 1. The top and bottom edges are at y and y + height - 1. The resulting rectangle covers an area width pixels wide by height pixels tall. The rectangle is filled using the graphics context's current color.

Parameters:

x - the x coordinate of the rectangle to be filled.

y - the y coordinate of the rectangle to be filled.

width - the width of the rectangle to be filled.

height - the height of the rectangle to be filled.

See Also:

fillRect, clearRect

 public void drawRect(int x,
                      int y,
                      int width,
                      int height)

Draws the outline of the specified rectangle. The left and right edges of the rectangle are at x and x + width. The top and bottom edges are at y and y + height. The rectangle is drawn using the graphics context's current color.

Parameters:

x - the x coordinate of the rectangle to be drawn.

y - the y coordinate of the rectangle to be drawn.

width - the width of the rectangle to be drawn.

height - the height of the rectangle to be drawn.

See Also:

fillRect, clearRect

 public abstract void clearRect(int x,
                                int y,
                                int width,
                                int height)

Clears the specified rectangle by filling it with the background color of the current drawing surface. This operation does not use the current paint mode.

Beginning with Java 1.1, the background color of offscreen images may be system dependent. Applications should use setColor followed by fillRect to ensure that an offscreen image is cleared to a specific color.

Parameters:

x - the x coordinate of the rectangle to clear.

y - the y coordinate of the rectangle to clear.

width - the width of the rectangle to clear.

height - the height of the rectangle to clear.

See Also:

fillRect, drawRect, setColor, setPaintMode, setXORMode

 public abstract void drawRoundRect(int x,
                                    int y,
                                    int width,
                                    int height,
                                    int arcWidth,
                                    int arcHeight)

Draws an outlined round-cornered rectangle using this graphics context's current color. The left and right edges of the rectangle are at x and x + width, respectively. The top and bottom edges of the rectangle are at y and y + height.

Parameters:

x - the x coordinate of the rectangle to be drawn.

y - the y coordinate of the rectangle to be drawn.

width - the width of the rectangle to be drawn.

height - the height of the rectangle to be drawn.

arcWidth - the horizontal diameter of the arc at the four corners.

arcHeight - the vertical diameter of the arc at the four corners.

See Also:

fillRoundRect

 public abstract void fillRoundRect(int x,
                                    int y,
                                    int width,
                                    int height,
                                    int arcWidth,
                                    int arcHeight)

Fills the specified rounded corner rectangle with the current color. The left and right edges of the rectangle are at x and x + width - 1, respectively. The top and bottom edges of the rectangle are at y and y + height - 1.

Parameters:

x - the x coordinate of the rectangle to be filled.

y - the y coordinate of the rectangle to be filled.

width - the width of the rectangle to be filled.

height - the height of the rectangle to be filled.

arcWidth - the horizontal diameter of the arc at the four corners.

arcHeight - the vertical diameter of the arc at the four corners.

See Also:

drawRoundRect

 public void draw3DRect(int x,
                        int y,
                        int width,
                        int height,
                        boolean raised)

Draws a 3-D highlighted outline of the specified rectangle. The edges of the rectangle are highlighted so that they appear to be beveled and lit from the upper left corner.

The colors used for the highlighting effect are determined based on the current color. The resulting rectangle covers an area that is width + 1 pixels wide by height + 1 pixels tall.

Parameters:

x - the x coordinate of the rectangle to be drawn.

y - the y coordinate of the rectangle to be drawn.

width - the width of the rectangle to be drawn.

height - the height of the rectangle to be drawn.

raised - a boolean that determines whether the rectangle appears to be raised above the surface or sunk into the surface.

See Also:

fill3DRect

fill3DRect

 public void fill3DRect(int x,
                        int y,
                        int width,
                        int height,
                        boolean raised)

Paints a 3-D highlighted rectangle filled with the current color. The edges of the rectangle will be highlighted so that it appears as if the edges were beveled and lit from the upper left corner. The colors used for the highlighting effect will be determined from the current color.

Parameters:

x - the x coordinate of the rectangle to be filled.

y - the y coordinate of the rectangle to be filled.

width - the width of the rectangle to be filled.

height - the height of the rectangle to be filled.

raised - a boolean value that determines whether the rectangle appears to be raised above the surface or etched into the surface.

See Also:

draw3DRect

drawOval

 public abstract void drawOval(int x,
                               int y,
                               int width,
                               int height)

Draws the outline of an oval. The result is a circle or ellipse that fits within the rectangle specified by the x, y, width, and height arguments.

The oval covers an area that is width + 1 pixels wide and height + 1 pixels tall.

Parameters:

x - the x coordinate of the upper left corner of the oval to be drawn.

y - the y coordinate of the upper left corner of the oval to be drawn.

width - the width of the oval to be drawn.

height - the height of the oval to be drawn.

See Also:

fillOval

fillOval

 public abstract void fillOval(int x,
                               int y,
                               int width,
                               int height)

Fills an oval bounded by the specified rectangle with the current color.

Parameters:

x - the x coordinate of the upper left corner of the oval to be filled.

y - the y coordinate of the upper left corner of the oval to be filled.

width - the width of the oval to be filled.

height - the height of the oval to be filled.

See Also:

drawOval

drawArc

 public abstract void drawArc(int x,
                              int y,
                              int width,
                              int height,
                              int startAngle,
                              int arcAngle)

Draws the outline of a circular or elliptical arc covering the specified rectangle.

The resulting arc begins at startAngle and extends for arcAngle degrees, using the current color. Angles are interpreted such that 0 degrees is at the 3 o'clock position. A positive value indicates a counter-clockwise rotation while a negative value indicates a clockwise rotation.

The center of the arc is the center of the rectangle whose origin is (x, y) and whose size is specified by the width and height arguments.

The resulting arc covers an area width + 1 pixels wide by height + 1 pixels tall.

Parameters:

x - the x coordinate of the upper-left corner of the arc to be drawn.

y - the y coordinate of the upper-left corner of the arc to be drawn.

width - the width of the arc to be drawn.

height - the height of the arc to be drawn.

startAngle - the beginning angle.

arcAngle - the angular extent of the arc, relative to the start angle.

See Also:

fillArc

fillArc

 public abstract void fillArc(int x,
                              int y,
                              int width,
                              int height,
                              int startAngle,
                              int arcAngle)

Fills a circular or elliptical arc covering the specified rectangle.

The resulting arc begins at startAngle and extends for arcAngle degrees. Angles are interpreted such that 0 degrees is at the 3 o'clock position. A positive value indicates a counter-clockwise rotation while a negative value indicates a clockwise rotation.

The center of the arc is the center of the rectangle whose origin is (x, y) and whose size is specified by the width and height arguments.

The resulting arc covers an area width + 1 pixels wide by height + 1 pixels tall.

Parameters:

x - the x coordinate of the upper-left corner of the arc to be filled.

y - the y coordinate of the upper-left corner of the arc to be filled.

width - the width of the arc to be filled.

height - the height of the arc to be filled.

startAngle - the beginning angle.

arcAngle - the angular extent of the arc, relative to the start angle.

See Also:

drawArc

drawPolyline

 public abstract void drawPolyline(int xPoints[],
                                   int yPoints[],
                                   int nPoints)

Draws a sequence of connected lines defined by arrays of x and y coordinates. Each pair of (x, y) coordinates defines a point. The figure is not closed if the first point differs from the last point.

Parameters:

xPoints - an array of x points

yPoints - an array of y points

nPoints - the total number of points

See Also:

drawPolygon

drawPolygon

 public abstract void drawPolygon(int xPoints[],
                                  int yPoints[],
                                  int nPoints)

Draws a closed polygon defined by arrays of x and y coordinates. Each pair of (x, y) coordinates defines a point.

This method draws the polygon defined by nPoint line segments, where the first nPoint - 1 line segments are line segments from (xPoints[i - 1], yPoints[i - 1]) to (xPoints[i], yPoints[i]), for 1 ≤ i ≤ nPoints. The figure is automatically closed by drawing a line connecting the final point to the first point, if those points are different.

Parameters:

xPoints - a an array of x coordinates.

yPoints - a an array of y coordinates.

nPoints - a the total number of points.

See Also:

fillPolygon, drawPolyline

drawPolygon

 public void drawPolygon(Polygon p)

Draws the outline of a polygon defined by the specified Polygon object.

Parameters:

p - the polygon to draw.

See Also:

fillPolygon, drawPolyline

fillPolygon

 public abstract void fillPolygon(int xPoints[],
                                  int yPoints[],
                                  int nPoints)

Fills a closed polygon defined by arrays of x and y coordinates.

This method draws the polygon defined by nPoint line segments, where the first nPoint - 1 line segments are line segments from (xPoints[i - 1], yPoints[i - 1]) to (xPoints[i], yPoints[i]), for 1 ≤ i ≤ nPoints. The figure is automatically closed by drawing a line connecting the final point to the first point, if those points are different.

The area inside the polygon is defined using an even-odd fill rule, also known as the alternating rule.

Parameters:

xPoints - a an array of x coordinates.

yPoints - a an array of y coordinates.

nPoints - a the total number of points.

See Also:

drawPolygon

fillPolygon

 public void fillPolygon(Polygon p)

Fills the polygon defined by the specified Polygon object with the graphics context's current color.

The area inside the polygon is defined using an even-odd fill rule, also known as the alternating rule.

Parameters:

p - the polygon to fill.

See Also:

drawPolygon

drawString

 public abstract void drawString(String str,
                                 int x,
                                 int y)

Draws the text given by the specified string, using this graphics context's current font and color. The baseline of the first character is at position (x, y) in this graphics context's coordinate system.

Parameters:

str - the string to be drawn.

x - the x coordinate.

y - the y coordinate.

See Also:

drawBytes, drawChars

drawChars

 public void drawChars(char data[],
                       int offset,
                       int length,
                       int x,
                       int y)

Draws the text given by the specified character array, using this graphics context's current font and color. The baseline of the first character is at position (x, y) in this graphics context's coordinate system.

Parameters:

data - the array of characters to be drawn

offset - the start offset in the data

length - the number of characters to be drawn

x - the x coordinate of the baseline of the text

y - the y coordinate of the baseline of the text

See Also:

drawBytes, drawString

drawBytes

 public void drawBytes(byte data[],
                       int offset,
                       int length,
                       int x,
                       int y)

Draws the text given by the specified byte array, using this graphics context's current font and color. The baseline of the first character is at position (x, y) in this graphics context's coordinate system.

Parameters:

data - the data to be drawn

offset - the start offset in the data

length - the number of bytes that are drawn

x - the x coordinate of the baseline of the text

y - the y coordinate of the baseline of the text

See Also:

drawChars, drawString

drawImage

 public abstract boolean drawImage(Image img,
                                   int x,
                                   int y,
                                   ImageObserver observer)

Draws as much of the specified image as is currently available. The image is drawn with its top-left corner at (x, y) in this graphics context's coordinate space. Transparent pixels in the image do not affect whatever pixels are already there.

This method returns immediately in all cases, even if the complete image has not yet been loaded, and it has not been dithered and converted for the current output device.

If the image has not yet been completely loaded, then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

Parameters:

img - the specified image to be drawn.

x - the x coordinate.

y - the y coordinate.

observer - object to be notified as more of the image is converted.

See Also:

Image, ImageObserver, imageUpdate

drawImage

 public abstract boolean drawImage(Image img,
                                   int x,
                                   int y,
                                   int width,
                                   int height,
                                   ImageObserver observer)

Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.

The image is drawn inside the specified rectangle of this graphics context's coordinate space, and is scaled if necessary. Transparent pixels do not affect whatever pixels are already there.

This method returns immediately in all cases, even if the entire image has not yet been scaled, dithered, and converted for the current output device. If the current output representation is not yet complete, then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the image observer by calling its imageUpdate method.

A scaled version of an image will not necessarily be available immediately just because an unscaled version of the image has been constructed for this output device. Each size of the image may be cached separately and generated from the original data in a separate image production sequence.

Parameters:

img - the specified image to be drawn.

x - the x coordinate.

y - the y coordinate.

width - the width of the rectangle.

height - the height of the rectangle.

observer - object to be notified as more of the image is converted.

See Also:

Image, ImageObserver, imageUpdate

drawImage

 public abstract boolean drawImage(Image img,
                                   int x,
                                   int y,
                                   Color bgcolor,
                                   ImageObserver observer)

Draws as much of the specified image as is currently available. The image is drawn with its top-left corner at (x, y) in this graphics context's coordinate space. Transparent pixels are drawn in the specified background color.

This operation is equivalent to filling a rectangle of the width and height of the specified image with the given color and then drawing the image on top of it, but possibly more efficient.

This method returns immediately in all cases, even if the complete image has not yet been loaded, and it has not been dithered and converted for the current output device.

If the image has not yet been completely loaded, then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

Parameters:

img - the specified image to be drawn.

x - the x coordinate.

y - the y coordinate.

bgcolor - the background color to paint under the non-opaque portions of the image.

observer - object to be notified as more of the image is converted.

See Also:

Image, ImageObserver, imageUpdate

drawImage

 public abstract boolean drawImage(Image img,
                                   int x,
                                   int y,
                                   int width,
                                   int height,
                                   Color bgcolor,
                                   ImageObserver observer)

Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.

The image is drawn inside the specified rectangle of this graphics context's coordinate space, and is scaled if necessary. Transparent pixels are drawn in the specified background color. This operation is equivalent to filling a rectangle of the width and height of the specified image with the given color and then drawing the image on top of it, but possibly more efficient.

This method returns immediately in all cases, even if the entire image has not yet been scaled, dithered, and converted for the current output device. If the current output representation is not yet complete then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

A scaled version of an image will not necessarily be available immediately just because an unscaled version of the image has been constructed for this output device. Each size of the image may be cached separately and generated from the original data in a separate image production sequence.

Parameters:

img - the specified image to be drawn.

x - the x coordinate.

y - the y coordinate.

width - the width of the rectangle.

height - the height of the rectangle.

bgcolor - the background color to paint under the non-opaque portions of the image.

observer - object to be notified as more of the image is converted.

See Also:

Image, ImageObserver, imageUpdate

drawImage

 public abstract boolean drawImage(Image img,
                                   int dx1,
                                   int dy1,
                                   int dx2,
                                   int dy2,
                                   int sx1,
                                   int sy1,
                                   int sx2,
                                   int sy2,
                                   ImageObserver observer)

Draws as much of the specified area of the specified image as is currently available, scaling it on the fly to fit inside the specified area of the destination drawable surface. Transparent pixels do not affect whatever pixels are already there.

This method returns immediately in all cases, even if the image area to be drawn has not yet been scaled, dithered, and converted for the current output device. If the current output representation is not yet complete then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

This method always uses the unscaled version of the image to render the scaled rectangle and performs the required scaling on the fly. It does not use a cached, scaled version of the image for this operation. Scaling of the image from source to destination is performed such that the first coordinate of the source rectangle is mapped to the first coordinate of the destination rectangle, and the second source coordinate is mapped to the second destination coordinate. The subimage is scaled and flipped as needed to preserve those mappings.

Parameters:

img - the specified image to be drawn

dx1 - the x coordinate of the first corner of the destination rectangle.

dy1 - the y coordinate of the first corner of the destination rectangle.

dx2 - the x coordinate of the second corner of the destination rectangle.

dy2 - the y coordinate of the second corner of the destination rectangle.

sx1 - the x coordinate of the first corner of the source rectangle.

sy1 - the y coordinate of the first corner of the source rectangle.

sx2 - the x coordinate of the second corner of the source rectangle.

sy2 - the y coordinate of the second corner of the source rectangle.

observer - object to be notified as more of the image is scaled and converted.

See Also:

Image, ImageObserver, imageUpdate

drawImage

 public abstract boolean drawImage(Image img,
                                   int dx1,
                                   int dy1,
                                   int dx2,
                                   int dy2,
                                   int sx1,
                                   int sy1,
                                   int sx2,
                                   int sy2,
                                   Color bgcolor,
                                   ImageObserver observer)

Draws as much of the specified area of the specified image as is currently available, scaling it on the fly to fit inside the specified area of the destination drawable surface.

Transparent pixels are drawn in the specified background color. This operation is equivalent to filling a rectangle of the width and height of the specified image with the given color and then drawing the image on top of it, but possibly more efficient.

This method returns immediately in all cases, even if the image area to be drawn has not yet been scaled, dithered, and converted for the current output device. If the current output representation is not yet complete then drawImage returns false. As more of the image becomes available, the process that draws the image notifies the specified image observer.

This method always uses the unscaled version of the image to render the scaled rectangle and performs the required scaling on the fly. It does not use a cached, scaled version of the image for this operation. Scaling of the image from source to destination is performed such that the first coordinate of the source rectangle is mapped to the first coordinate of the destination rectangle, and the second source coordinate is mapped to the second destination coordinate. The subimage is scaled and flipped as needed to preserve those mappings.

Parameters:

img - the specified image to be drawn

dx1 - the x coordinate of the first corner of the destination rectangle.

dy1 - the y coordinate of the first corner of the destination rectangle.

dx2 - the x coordinate of the second corner of the destination rectangle.

dy2 - the y coordinate of the second corner of the destination rectangle.

sx1 - the x coordinate of the first corner of the source rectangle.

sy1 - the y coordinate of the first corner of the source rectangle.

sx2 - the x coordinate of the second corner of the source rectangle.

sy2 - the y coordinate of the second corner of the source rectangle.

bgcolor - the background color to paint under the non-opaque portions of the image.

observer - object to be notified as more of the image is scaled and converted.

See Also:

Image, ImageObserver, imageUpdate

dispose

 public abstract void dispose()

Disposes of this graphics context and releases any system resources that it is using. A Graphics object cannot be used after disposehas been called.

When a Java program runs, a large number of Graphics objects can be created within a short time frame. Although the finalization process of the garbage collector also disposes of the same system resources, it is preferable to manually free the associated resources by calling this method rather than to rely on a finalization process which may not run to completion for a long period of time.

Graphics objects which are provided as arguments to the paint and update methods of components are automatically released by the system when those methods return. For efficiency, programmers should call dispose when finished using a Graphics object only if it was created directly from a component or another Graphics object.

See Also:

finalize, paint, update, getGraphics, create

finalize

 public void finalize()

Disposes of this graphics context once it is no longer referenced.

Overrides:

finalize in class Object

See Also:

dispose

toString

 public String toString()

Returns a String object representing this Graphics object's value.

Returns:

a string representation of this graphics context.

Overrides:

toString in class Object

getClipRect

 public Rectangle getClipRect()

Note: getClipRect() is deprecated. As of JDK version 1.1, replaced by getClipBounds().

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