Class java.awt.Graphics
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Class java.awt.Graphics
java.lang.Object
|
+----java.awt.Graphics
- public class Graphics
- extends Object
Graphics is the abstract base class for all graphic
contexts for various devices.
-
Graphics()
- Constructs a new Graphics Object.
-
clearRect(int, int, int, int)
-
Clears the specified rectangle by filling it with the current background color
of the current drawing surface.
-
clipRect(int, int, int, int)
-
Clips to a rectangle.
-
copyArea(int, int, int, int, int, int)
- Copies an area of the screen.
-
create()
- Creates a new Graphics Object that is a copy of the original Graphics Object.
-
create(int, int, int, int)
- Creates a new Graphics Object with the specified parameters, based on the original
Graphics Object.
-
dispose()
- Disposes of this graphics context.
-
draw3DRect(int, int, int, int, boolean)
- Draws a highlighted 3-D rectangle.
-
drawArc(int, int, int, int, int, int)
- Draws an arc bounded by the specified rectangle from startAngle to
endAngle.
-
drawBytes(byte[], int, int, int, int)
-
Draws the specified bytes using the current font and color.
-
drawChars(char[], int, int, int, int)
-
Draws the specified characters using the current font and color.
-
drawImage(Image, int, int, ImageObserver)
-
Draws the specified image at the specified coordinate (x, y).
-
drawImage(Image, int, int, int, int, ImageObserver)
- Draws the specified image inside the specified rectangle.
-
drawImage(Image, int, int, Color, ImageObserver)
-
Draws the specified image at the specified coordinate (x, y),
with the given solid background Color.
-
drawImage(Image, int, int, int, int, Color, ImageObserver)
- Draws the specified image inside the specified rectangle,
with the given solid background Color.
-
drawLine(int, int, int, int)
-
Draws a line between the coordinates (x1,y1) and (x2,y2).
-
drawOval(int, int, int, int)
-
Draws an oval inside the specified rectangle using the current color.
-
drawPolygon(int[], int[], int)
-
Draws a polygon defined by an array of x points and y points.
-
drawPolygon(Polygon)
-
Draws a polygon defined by the specified point.
-
drawRect(int, int, int, int)
-
Draws the outline of the specified rectangle using the current color.
-
drawRoundRect(int, int, int, int, int, int)
-
Draws an outlined rounded corner rectangle using the current color.
-
drawString(String, int, int)
-
Draws the specified String using the current font and color.
-
fill3DRect(int, int, int, int, boolean)
- Paints a highlighted 3-D rectangle using the current color.
-
fillArc(int, int, int, int, int, int)
-
Fills an arc using the current color.
-
fillOval(int, int, int, int)
-
Fills an oval inside the specified rectangle using the current color.
-
fillPolygon(int[], int[], int)
-
Fills a polygon with the current color using an
even-odd fill rule (otherwise known as an alternating rule).
-
fillPolygon(Polygon)
-
Fills the specified polygon with the current color using an
even-odd fill rule (otherwise known as an alternating rule).
-
fillRect(int, int, int, int)
-
Fills the specified rectangle with the current color.
-
fillRoundRect(int, int, int, int, int, int)
-
Draws a rounded rectangle filled in with the current color.
-
finalize()
- Disposes of this graphics context once it is no longer referenced.
-
getClipRect()
-
Returns the bounding rectangle of the current clipping area.
-
getColor()
- Gets the current color.
-
getFont()
- Gets the current font.
-
getFontMetrics()
- Gets the current font metrics.
-
getFontMetrics(Font)
- Gets the current font metrics for the specified font.
-
setColor(Color)
- Sets the current color to the specified color.
-
setFont(Font)
- Sets the font for all subsequent text-drawing operations.
-
setPaintMode()
- Sets the paint mode to overwrite the destination with the
current color.
-
setXORMode(Color)
- Sets the paint mode to alternate between the current color
and the new specified color.
-
toString()
- Returns a String object representing this Graphic's value.
-
translate(int, int)
- Translates the specified parameters into the origin of the graphics context.
Graphics
protected Graphics()
- Constructs a new Graphics Object. Graphic contexts cannot be
created directly. They must be obtained from another graphics
context or either a component can create them.
- See Also:
- getGraphics, create
create
public abstract Graphics create()
- Creates a new Graphics Object that is a copy of the original Graphics Object.
create
public Graphics create(int x,
int y,
int width,
int height)
- Creates a new Graphics Object with the specified parameters, based on the original
Graphics Object.
This method translates the specified parameters, x and y, to
the proper origin coordinates and then clips the Graphics Object to the
area.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the area
- height - the height of the area
- See Also:
- translate
translate
public abstract void translate(int x,
int y)
- Translates the specified parameters into the origin of the graphics context. All subsequent
operations on this graphics context will be relative to this origin.
- Parameters:
- x - the x coordinate
- y - the y coordinate
getColor
public abstract Color getColor()
- Gets the current color.
- See Also:
- setColor
setColor
public abstract void setColor(Color c)
- Sets the current color to the specified color. All subsequent graphics operations
will use this specified color.
- Parameters:
- c - the color to be set
- See Also:
- Color, getColor
setPaintMode
public abstract void setPaintMode()
- Sets the paint mode to overwrite the destination with the
current color.
setXORMode
public abstract void setXORMode(Color c1)
- Sets the paint mode to alternate between the current color
and the new specified color. When drawing operations are
performed, pixels which are the current color will be changed
to the specified color and vice versa. Pixels of colors other
than those two colors will be changed in an unpredictable, but
reversible manner - if you draw the same figure twice then all
pixels will be restored to their original values.
- Parameters:
- c1 - the second color
getFont
public abstract Font getFont()
- Gets the current font.
- See Also:
- setFont
setFont
public abstract void setFont(Font font)
- Sets the font for all subsequent text-drawing operations.
- Parameters:
- font - the specified font
- See Also:
- Font, getFont, drawString, drawBytes, drawChars
getFontMetrics
public FontMetrics getFontMetrics()
- Gets the current font metrics.
- See Also:
- getFont
getFontMetrics
public abstract FontMetrics getFontMetrics(Font f)
- Gets the current font metrics for the specified font.
- Parameters:
- f - the specified font
- See Also:
- getFont, getFontMetrics
getClipRect
public abstract Rectangle getClipRect()
- Returns the bounding rectangle of the current clipping area.
- See Also:
- clipRect
clipRect
public abstract void clipRect(int x,
int y,
int width,
int height)
- Clips to a rectangle. The resulting clipping area is the
intersection of the current clipping area and the specified
rectangle. Graphic operations have no effect outside of the
clipping area.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- See Also:
- getClipRect
copyArea
public abstract void copyArea(int x,
int y,
int width,
int height,
int dx,
int dy)
- Copies an area of the screen.
- Parameters:
- x - the x-coordinate of the source
- y - the y-coordinate of the source
- width - the width
- height - the height
- dx - the horizontal distance
- dy - the vertical distance
drawLine
public abstract void drawLine(int x1,
int y1,
int x2,
int y2)
- Draws a line between the coordinates (x1,y1) and (x2,y2). The line is drawn
below and to the left of the logical coordinates.
- 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
fillRect
public abstract void fillRect(int x,
int y,
int width,
int height)
- Fills the specified rectangle with the current color.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- See Also:
- drawRect, clearRect
drawRect
public void drawRect(int x,
int y,
int width,
int height)
- Draws the outline of the specified rectangle using the current color.
Use drawRect(x, y, width-1, height-1) to draw the outline inside the specified
rectangle.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- See Also:
- fillRect, clearRect
clearRect
public abstract void clearRect(int x,
int y,
int width,
int height)
- Clears the specified rectangle by filling it with the current background color
of the current drawing surface.
Which drawing surface it selects depends on how the graphics context
was created.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- See Also:
- fillRect, drawRect
drawRoundRect
public abstract void drawRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
- Draws an outlined rounded corner rectangle using the current color.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- arcWidth - the horizontal diameter of the arc at the four corners
- arcHeight - the horizontal diameter of the arc at the four corners
- See Also:
- fillRoundRect
fillRoundRect
public abstract void fillRoundRect(int x,
int y,
int width,
int height,
int arcWidth,
int arcHeight)
- Draws a rounded rectangle filled in with the current color.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- arcWidth - the horizontal diameter of the arc at the four corners
- arcHeight - the horizontal diameter of the arc at the four corners
- See Also:
- drawRoundRect
draw3DRect
public void draw3DRect(int x,
int y,
int width,
int height,
boolean raised)
- Draws a highlighted 3-D rectangle.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- raised - a boolean that states whether the rectangle is raised or not
fill3DRect
public void fill3DRect(int x,
int y,
int width,
int height,
boolean raised)
- Paints a highlighted 3-D rectangle using the current color.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- raised - a boolean that states whether the rectangle is raised or not
drawOval
public abstract void drawOval(int x,
int y,
int width,
int height)
- Draws an oval inside the specified rectangle using the current color.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- See Also:
- fillOval
fillOval
public abstract void fillOval(int x,
int y,
int width,
int height)
- Fills an oval inside the specified rectangle using the current color.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- See Also:
- drawOval
drawArc
public abstract void drawArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
- Draws an arc bounded by the specified rectangle from startAngle to
endAngle. 0 degrees is at the 3-o'clock position.Positive arc
angles indicate counter-clockwise rotations, negative arc angles are
drawn clockwise.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the rectangle
- height - the height of the rectangle
- startAngle - the beginning angle
- arcAngle - the angle of the arc (relative to startAngle).
- See Also:
- fillArc
fillArc
public abstract void fillArc(int x,
int y,
int width,
int height,
int startAngle,
int arcAngle)
- Fills an arc using the current color. This generates a pie shape.
- Parameters:
- x - the x coordinate
- y - the y coordinate
- width - the width of the arc
- height - the height of the arc
- startAngle - the beginning angle
- arcAngle - the angle of the arc (relative to startAngle).
- See Also:
- drawArc
drawPolygon
public abstract void drawPolygon(int xPoints[],
int yPoints[],
int nPoints)
- Draws a polygon defined by an array of x points and y points.
- Parameters:
- xPoints - an array of x points
- yPoints - an array of y points
- nPoints - the total number of points
- See Also:
- fillPolygon
drawPolygon
public void drawPolygon(Polygon p)
- Draws a polygon defined by the specified point.
- Parameters:
- p - the specified polygon
- See Also:
- fillPolygon
fillPolygon
public abstract void fillPolygon(int xPoints[],
int yPoints[],
int nPoints)
- Fills a polygon with the current color using an
even-odd fill rule (otherwise known as an alternating rule).
- Parameters:
- xPoints - an array of x points
- yPoints - an array of y points
- nPoints - the total number of points
- See Also:
- drawPolygon
fillPolygon
public void fillPolygon(Polygon p)
- Fills the specified polygon with the current color using an
even-odd fill rule (otherwise known as an alternating rule).
- Parameters:
- p - the polygon
- See Also:
- drawPolygon
drawString
public abstract void drawString(String str,
int x,
int y)
- Draws the specified String using the current font and color.
The x,y position is the starting point of the baseline of the String.
- Parameters:
- str - the String to be drawn
- x - the x coordinate
- y - the y coordinate
- See Also:
- drawChars, drawBytes
drawChars
public void drawChars(char data[],
int offset,
int length,
int x,
int y)
- Draws the specified characters using the current font and color.
- 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
- y - the y coordinate
- See Also:
- drawString, drawBytes
drawBytes
public void drawBytes(byte data[],
int offset,
int length,
int x,
int y)
- Draws the specified bytes using the current font and color.
- 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
- y - the y coordinate
- See Also:
- drawString, drawChars
drawImage
public abstract boolean drawImage(Image img,
int x,
int y,
ImageObserver observer)
- Draws the specified image at the specified coordinate (x, y). If the image is
incomplete the image observer will be notified later.
- Parameters:
- img - the specified image to be drawn
- x - the x coordinate
- y - the y coordinate
- observer - notifies if the image is complete or not
- See Also:
- Image, ImageObserver
drawImage
public abstract boolean drawImage(Image img,
int x,
int y,
int width,
int height,
ImageObserver observer)
- Draws the specified image inside the specified rectangle. The image is
scaled if necessary. If the image is incomplete the image observer will be
notified later.
- 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 - notifies if the image is complete or not
- See Also:
- Image, ImageObserver
drawImage
public abstract boolean drawImage(Image img,
int x,
int y,
Color bgcolor,
ImageObserver observer)
- Draws the specified image at the specified coordinate (x, y),
with the given solid background Color. If the image is
incomplete the image observer will be notified later.
- Parameters:
- img - the specified image to be drawn
- x - the x coordinate
- y - the y coordinate
- observer - notifies if the image is complete or not
- See Also:
- Image, ImageObserver
drawImage
public abstract boolean drawImage(Image img,
int x,
int y,
int width,
int height,
Color bgcolor,
ImageObserver observer)
- Draws the specified image inside the specified rectangle,
with the given solid background Color. The image is
scaled if necessary. If the image is incomplete the image
observer will be notified later.
- 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 - notifies if the image is complete or not
- See Also:
- Image, ImageObserver
dispose
public abstract void dispose()
- Disposes of this graphics context. The Graphics context cannot be used after
being disposed of.
- See Also:
- finalize
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 Graphic's value.
- Overrides:
- toString in class Object
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