RenderedImage
, WritableRenderedImage
, Transparency
public class BufferedImage extends Image implements WritableRenderedImage, Transparency
BufferedImage
subclass describes an Image
with an accessible buffer of image data. A BufferedImage
is comprised of a ColorModel
and a Raster
of image data. The number and types of bands in the SampleModel
of the Raster
must match the number and types required by the ColorModel
to represent its color and alpha components. All BufferedImage
objects have an upper left corner coordinate of (0, 0). Any Raster
used to construct a BufferedImage
must therefore have minX=0 and minY=0. This class relies on the data fetching and setting methods of Raster
, and on the color characterization methods of ColorModel
.
Modifier and Type | Field | Description |
---|---|---|
static final int |
TYPE_3BYTE_BGR |
Represents an image with 8-bit RGB color components, corresponding to a Windows-style BGR color model) with the colors Blue, Green, and Red stored in 3 bytes. |
static final int |
TYPE_4BYTE_ABGR |
Represents an image with 8-bit RGBA color components with the colors Blue, Green, and Red stored in 3 bytes and 1 byte of alpha. |
static final int |
TYPE_4BYTE_ABGR_PRE |
Represents an image with 8-bit RGBA color components with the colors Blue, Green, and Red stored in 3 bytes and 1 byte of alpha. |
static final int |
TYPE_BYTE_BINARY |
Represents an opaque byte-packed 1, 2, or 4 bit image. |
static final int |
TYPE_BYTE_GRAY |
Represents a unsigned byte grayscale image, non-indexed. |
static final int |
TYPE_BYTE_INDEXED |
Represents an indexed byte image. |
static final int |
TYPE_CUSTOM |
Image type is not recognized so it must be a customized image. |
static final int |
TYPE_INT_ARGB |
Represents an image with 8-bit RGBA color components packed into integer pixels. |
static final int |
TYPE_INT_ARGB_PRE |
Represents an image with 8-bit RGBA color components packed into integer pixels. |
static final int |
TYPE_INT_BGR |
Represents an image with 8-bit RGB color components, corresponding to a Windows- or Solaris- style BGR color model, with the colors Blue, Green, and Red packed into integer pixels. |
static final int |
TYPE_INT_RGB |
Represents an image with 8-bit RGB color components packed into integer pixels. |
static final int |
TYPE_USHORT_555_RGB |
Represents an image with 5-5-5 RGB color components (5-bits red, 5-bits green, 5-bits blue) with no alpha. |
static final int |
TYPE_USHORT_565_RGB |
Represents an image with 5-6-5 RGB color components (5-bits red, 6-bits green, 5-bits blue) with no alpha. |
static final int |
TYPE_USHORT_GRAY |
Represents an unsigned short grayscale image, non-indexed). |
accelerationPriority, SCALE_AREA_AVERAGING, SCALE_DEFAULT, SCALE_FAST, SCALE_REPLICATE, SCALE_SMOOTH, UndefinedProperty
BITMASK, OPAQUE, TRANSLUCENT
Constructor | Description |
---|---|
BufferedImage |
Constructs a BufferedImage of one of the predefined image types. |
BufferedImage |
Constructs a BufferedImage of one of the predefined image types: TYPE_BYTE_BINARY or TYPE_BYTE_INDEXED. |
BufferedImage |
Constructs a new BufferedImage with a specified ColorModel and Raster . |
Modifier and Type | Method | Description |
---|---|---|
void |
addTileObserver |
Adds a tile observer. |
void |
coerceData |
Forces the data to match the state specified in the isAlphaPremultiplied variable. |
WritableRaster |
copyData |
Computes an arbitrary rectangular region of the BufferedImage and copies it into a specified WritableRaster . |
Graphics2D |
createGraphics() |
Creates a Graphics2D , which can be used to draw into this BufferedImage . |
WritableRaster |
getAlphaRaster() |
Returns a WritableRaster representing the alpha channel for BufferedImage objects with ColorModel objects that support a separate spatial alpha channel, such as ComponentColorModel and DirectColorModel . |
ColorModel |
getColorModel() |
Returns the ColorModel . |
Raster |
getData() |
Returns the image as one large tile. |
Raster |
getData |
Computes and returns an arbitrary region of the BufferedImage . |
Graphics |
getGraphics() |
This method returns a Graphics2D , but is here for backwards compatibility. |
int |
getHeight() |
Returns the height of the BufferedImage . |
int |
getHeight |
Returns the height of the BufferedImage . |
int |
getMinTileX() |
Returns the minimum tile index in the x direction. |
int |
getMinTileY() |
Returns the minimum tile index in the y direction. |
int |
getMinX() |
Returns the minimum x coordinate of this BufferedImage . |
int |
getMinY() |
Returns the minimum y coordinate of this BufferedImage . |
int |
getNumXTiles() |
Returns the number of tiles in the x direction. |
int |
getNumYTiles() |
Returns the number of tiles in the y direction. |
Object |
getProperty |
Returns a property of the image by name. |
Object |
getProperty |
Returns a property of the image by name. |
String[] |
getPropertyNames() |
Returns an array of names recognized by getProperty(String) or null , if no property names are recognized. |
WritableRaster |
getRaster() |
Returns the WritableRaster . |
int |
getRGB |
Returns an integer pixel in the default RGB color model (TYPE_INT_ARGB) and default sRGB colorspace. |
int[] |
getRGB |
Returns an array of integer pixels in the default RGB color model (TYPE_INT_ARGB) and default sRGB color space, from a portion of the image data. |
SampleModel |
getSampleModel() |
Returns the SampleModel associated with this BufferedImage . |
ImageProducer |
getSource() |
Returns the object that produces the pixels for the image. |
Vector |
getSources() |
Returns a Vector of RenderedImage objects that are the immediate sources, not the sources of these immediate sources, of image data for this BufferedImage . |
BufferedImage |
getSubimage |
Returns a subimage defined by a specified rectangular region. |
Raster |
getTile |
Returns tile ( tileX , tileY ). |
int |
getTileGridXOffset() |
Returns the x offset of the tile grid relative to the origin, For example, the x coordinate of the location of tile (0, 0). |
int |
getTileGridYOffset() |
Returns the y offset of the tile grid relative to the origin, For example, the y coordinate of the location of tile (0, 0). |
int |
getTileHeight() |
Returns the tile height in pixels. |
int |
getTileWidth() |
Returns the tile width in pixels. |
int |
getTransparency() |
Returns the transparency. |
int |
getType() |
Returns the image type. |
int |
getWidth() |
Returns the width of the BufferedImage . |
int |
getWidth |
Returns the width of the BufferedImage . |
WritableRaster |
getWritableTile |
Checks out a tile for writing. |
Point[] |
getWritableTileIndices() |
Returns an array of Point objects indicating which tiles are checked out for writing. |
boolean |
hasTileWriters() |
Returns whether or not any tile is checked out for writing. |
boolean |
isAlphaPremultiplied() |
Returns whether or not the alpha has been premultiplied. |
boolean |
isTileWritable |
Returns whether or not a tile is currently checked out for writing. |
void |
releaseWritableTile |
Relinquishes permission to write to a tile. |
void |
removeTileObserver |
Removes a tile observer. |
void |
setData |
Sets a rectangular region of the image to the contents of the specified Raster r , which is assumed to be in the same coordinate space as the BufferedImage . |
void |
setRGB |
Sets a pixel in this BufferedImage to the specified RGB value. |
void |
setRGB |
Sets an array of integer pixels in the default RGB color model (TYPE_INT_ARGB) and default sRGB color space, into a portion of the image data. |
String |
toString() |
Returns a String representation of this BufferedImage object and its values. |
flush, getAccelerationPriority, getCapabilities, getScaledInstance, setAccelerationPriority
public static final int TYPE_CUSTOM
public static final int TYPE_INT_RGB
DirectColorModel
without alpha. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite
documentation.public static final int TYPE_INT_ARGB
DirectColorModel
with alpha. The color data in this image is considered not to be premultiplied with alpha. When this type is used as the imageType
argument to a BufferedImage
constructor, the created image is consistent with images created in the JDK1.1 and earlier releases.public static final int TYPE_INT_ARGB_PRE
DirectColorModel
with alpha. The color data in this image is considered to be premultiplied with alpha.public static final int TYPE_INT_BGR
DirectColorModel
. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite
documentation.public static final int TYPE_3BYTE_BGR
ComponentColorModel
. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite
documentation.public static final int TYPE_4BYTE_ABGR
ComponentColorModel
with alpha. The color data in this image is considered not to be premultiplied with alpha. The byte data is interleaved in a single byte array in the order A, B, G, R from lower to higher byte addresses within each pixel.public static final int TYPE_4BYTE_ABGR_PRE
ComponentColorModel
with alpha. The color data in this image is considered to be premultiplied with alpha. The byte data is interleaved in a single byte array in the order A, B, G, R from lower to higher byte addresses within each pixel.public static final int TYPE_USHORT_565_RGB
DirectColorModel
. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite
documentation.public static final int TYPE_USHORT_555_RGB
DirectColorModel
. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite
documentation.public static final int TYPE_BYTE_GRAY
ComponentColorModel
with a CS_GRAY ColorSpace
. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite
documentation.public static final int TYPE_USHORT_GRAY
ComponentColorModel
with a CS_GRAY ColorSpace
. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite
documentation.public static final int TYPE_BYTE_BINARY
IndexColorModel
without alpha. When this type is used as the imageType
argument to the BufferedImage
constructor that takes an imageType
argument but no ColorModel
argument, a 1-bit image is created with an IndexColorModel
with two colors in the default sRGB ColorSpace
: {0, 0, 0} and {255, 255, 255}. Images with 2 or 4 bits per pixel may be constructed via the BufferedImage
constructor that takes a ColorModel
argument by supplying a ColorModel
with an appropriate map size.
Images with 8 bits per pixel should use the image types TYPE_BYTE_INDEXED
or TYPE_BYTE_GRAY
depending on their ColorModel
.
When color data is stored in an image of this type, the closest color in the colormap is determined by the IndexColorModel
and the resulting index is stored. Approximation and loss of alpha or color components can result, depending on the colors in the IndexColorModel
colormap.
public static final int TYPE_BYTE_INDEXED
imageType
argument to the BufferedImage
constructor that takes an imageType
argument but no ColorModel
argument, an IndexColorModel
is created with a 256-color 6/6/6 color cube palette with the rest of the colors from 216-255 populated by grayscale values in the default sRGB ColorSpace. When color data is stored in an image of this type, the closest color in the colormap is determined by the IndexColorModel
and the resulting index is stored. Approximation and loss of alpha or color components can result, depending on the colors in the IndexColorModel
colormap.
public BufferedImage(int width, int height, int imageType)
BufferedImage
of one of the predefined image types. The ColorSpace
for the image is the default sRGB space.width
- width of the created imageheight
- height of the created imageimageType
- type of the created imagepublic BufferedImage(int width, int height, int imageType, IndexColorModel cm)
BufferedImage
of one of the predefined image types: TYPE_BYTE_BINARY or TYPE_BYTE_INDEXED. If the image type is TYPE_BYTE_BINARY, the number of entries in the color model is used to determine whether the image should have 1, 2, or 4 bits per pixel. If the color model has 1 or 2 entries, the image will have 1 bit per pixel. If it has 3 or 4 entries, the image with have 2 bits per pixel. If it has between 5 and 16 entries, the image will have 4 bits per pixel. Otherwise, an IllegalArgumentException will be thrown.
width
- width of the created imageheight
- height of the created imageimageType
- type of the created imagecm
- IndexColorModel
of the created imageIllegalArgumentException
- if the imageType is not TYPE_BYTE_BINARY or TYPE_BYTE_INDEXED or if the imageType is TYPE_BYTE_BINARY and the color map has more than 16 entries.public BufferedImage(ColorModel cm, WritableRaster raster, boolean isRasterPremultiplied, Hashtable<?,?> properties)
BufferedImage
with a specified ColorModel
and Raster
. If the number and types of bands in the SampleModel
of the Raster
do not match the number and types required by the ColorModel
to represent its color and alpha components, a RasterFormatException
is thrown. This method can multiply or divide the color Raster
data by alpha to match the alphaPremultiplied
state in the ColorModel
. Properties for this BufferedImage
can be established by passing in a Hashtable
of String
/Object
pairs.cm
- ColorModel
for the new imageraster
- Raster
for the image dataisRasterPremultiplied
- if true
, the data in the raster has been premultiplied with alpha.properties
- Hashtable
of String
/Object
pairs.RasterFormatException
- if the number and types of bands in the SampleModel
of the Raster
do not match the number and types required by the ColorModel
to represent its color and alpha components.IllegalArgumentException
- if raster
is incompatible with cm
public int getType()
BufferedImage
.public ColorModel getColorModel()
ColorModel
.getColorModel
in interface RenderedImage
ColorModel
of this BufferedImage
.public WritableRaster getRaster()
WritableRaster
.WritableRaster
of this BufferedImage
.public WritableRaster getAlphaRaster()
WritableRaster
representing the alpha channel for BufferedImage
objects with ColorModel
objects that support a separate spatial alpha channel, such as ComponentColorModel
and DirectColorModel
. Returns null
if there is no alpha channel associated with the ColorModel
in this image. This method assumes that for all ColorModel
objects other than IndexColorModel
, if the ColorModel
supports alpha, there is a separate alpha channel which is stored as the last band of image data. If the image uses an IndexColorModel
that has alpha in the lookup table, this method returns null
since there is no spatially discrete alpha channel. This method creates a new WritableRaster
, but shares the data array.WritableRaster
or null
if this BufferedImage
has no alpha channel associated with its ColorModel
.public int getRGB(int x, int y)
ColorModel
. There are only 8-bits of precision for each color component in the returned data when using this method. An ArrayOutOfBoundsException
may be thrown if the coordinates are not in bounds. However, explicit bounds checking is not guaranteed.
x
- the X coordinate of the pixel from which to get the pixel in the default RGB color model and sRGB color spacey
- the Y coordinate of the pixel from which to get the pixel in the default RGB color model and sRGB color spacepublic int[] getRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)
ColorModel
. There are only 8-bits of precision for each color component in the returned data when using this method. With a specified coordinate (x, y) in the image, the ARGB pixel can be accessed in this way: pixel = rgbArray[offset + (y-startY)*scansize + (x-startX)];
An ArrayOutOfBoundsException
may be thrown if the region is not in bounds. However, explicit bounds checking is not guaranteed.
startX
- the starting X coordinatestartY
- the starting Y coordinatew
- width of regionh
- height of regionrgbArray
- if not null
, the rgb pixels are written hereoffset
- offset into the rgbArray
scansize
- scanline stride for the rgbArray
public void setRGB(int x, int y, int rgb)
BufferedImage
to the specified RGB value. The pixel is assumed to be in the default RGB color model, TYPE_INT_ARGB, and default sRGB color space. For images with an IndexColorModel
, the index with the nearest color is chosen. An ArrayOutOfBoundsException
may be thrown if the coordinates are not in bounds. However, explicit bounds checking is not guaranteed.
x
- the X coordinate of the pixel to sety
- the Y coordinate of the pixel to setrgb
- the RGB valuepublic void setRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)
ColorModel
. There are only 8-bits of precision for each color component in the returned data when using this method. With a specified coordinate (x, y) in the this image, the ARGB pixel can be accessed in this way: pixel = rgbArray[offset + (y-startY)*scansize + (x-startX)];WARNING: No dithering takes place.
An ArrayOutOfBoundsException
may be thrown if the region is not in bounds. However, explicit bounds checking is not guaranteed.
startX
- the starting X coordinatestartY
- the starting Y coordinatew
- width of the regionh
- height of the regionrgbArray
- the rgb pixelsoffset
- offset into the rgbArray
scansize
- scanline stride for the rgbArray
public int getWidth()
BufferedImage
.getWidth
in interface RenderedImage
BufferedImage
public int getHeight()
BufferedImage
.getHeight
in interface RenderedImage
BufferedImage
public int getWidth(ImageObserver observer)
BufferedImage
.public int getHeight(ImageObserver observer)
BufferedImage
.public ImageProducer getSource()
getSource
in class Image
ImageProducer
that is used to produce the pixels for this image.public Object getProperty(String name, ImageObserver observer)
UndefinedProperty
field. If the properties for this image are not yet known, then this method returns null
and the ImageObserver
object is notified later. The property name "comment" should be used to store an optional comment that can be presented to the user as a description of the image, its source, or its author.getProperty
in class Image
name
- the property nameobserver
- the ImageObserver
that receives notification regarding image informationObject
that is the property referred to by the specified name
or null
if the properties of this image are not yet known.NullPointerException
- if the property name is null.public Object getProperty(String name)
getProperty
in interface RenderedImage
name
- the property nameObject
that is the property referred to by the specified name
.NullPointerException
- if the property name is null.public Graphics getGraphics()
Graphics2D
, but is here for backwards compatibility. createGraphics
is more convenient, since it is declared to return a Graphics2D
.getGraphics
in class Image
Graphics2D
, which can be used to draw into this image.public Graphics2D createGraphics()
Graphics2D
, which can be used to draw into this BufferedImage
.Graphics2D
, used for drawing into this image.public BufferedImage getSubimage(int x, int y, int w, int h)
BufferedImage
shares the same data array as the original image.x
- the X coordinate of the upper-left corner of the specified rectangular regiony
- the Y coordinate of the upper-left corner of the specified rectangular regionw
- the width of the specified rectangular regionh
- the height of the specified rectangular regionBufferedImage
that is the subimage of this BufferedImage
.RasterFormatException
- if the specified area is not contained within this BufferedImage
.public boolean isAlphaPremultiplied()
false
if there is no alpha.true
if the alpha has been premultiplied; false
otherwise.public void coerceData(boolean isAlphaPremultiplied)
isAlphaPremultiplied
variable. It may multiply or divide the color raster data by alpha, or do nothing if the data is in the correct state.isAlphaPremultiplied
- true
if the alpha has been premultiplied; false
otherwise.public String toString()
String
representation of this BufferedImage
object and its values.public Vector<RenderedImage> getSources()
Vector
of RenderedImage
objects that are the immediate sources, not the sources of these immediate sources, of image data for this BufferedImage
. This method returns null
if the BufferedImage
has no information about its immediate sources. It returns an empty Vector
if the BufferedImage
has no immediate sources.getSources
in interface RenderedImage
Vector
containing immediate sources of this BufferedImage
object's image date, or null
if this BufferedImage
has no information about its immediate sources, or an empty Vector
if this BufferedImage
has no immediate sources.public String[] getPropertyNames()
getProperty(String)
or null
, if no property names are recognized.getPropertyNames
in interface RenderedImage
String
array containing all of the property names that getProperty(String)
recognizes; or null
if no property names are recognized.public int getMinX()
BufferedImage
. This is always zero.getMinX
in interface RenderedImage
BufferedImage
.public int getMinY()
BufferedImage
. This is always zero.getMinY
in interface RenderedImage
BufferedImage
.public SampleModel getSampleModel()
SampleModel
associated with this BufferedImage
.getSampleModel
in interface RenderedImage
SampleModel
of this BufferedImage
.public int getNumXTiles()
getNumXTiles
in interface RenderedImage
public int getNumYTiles()
getNumYTiles
in interface RenderedImage
public int getMinTileX()
getMinTileX
in interface RenderedImage
public int getMinTileY()
getMinTileY
in interface RenderedImage
public int getTileWidth()
getTileWidth
in interface RenderedImage
public int getTileHeight()
getTileHeight
in interface RenderedImage
public int getTileGridXOffset()
getTileGridXOffset
in interface RenderedImage
public int getTileGridYOffset()
getTileGridYOffset
in interface RenderedImage
public Raster getTile(int tileX, int tileY)
tileX
, tileY
). Note that tileX
and tileY
are indices into the tile array, not pixel locations. The Raster
that is returned is live, which means that it is updated if the image is changed.getTile
in interface RenderedImage
tileX
- the x index of the requested tile in the tile arraytileY
- the y index of the requested tile in the tile arrayRaster
that is the tile defined by the arguments tileX
and tileY
.ArrayIndexOutOfBoundsException
- if both tileX
and tileY
are not equal to 0public Raster getData()
Raster
returned is a copy of the image data is not updated if the image is changed.getData
in interface RenderedImage
Raster
that is a copy of the image data.public Raster getData(Rectangle rect)
BufferedImage
. The Raster
returned is a copy of the image data and is not updated if the image is changed.getData
in interface RenderedImage
rect
- the region of the BufferedImage
to be returned.Raster
that is a copy of the image data of the specified region of the BufferedImage
public WritableRaster copyData(WritableRaster outRaster)
BufferedImage
and copies it into a specified WritableRaster
. The region to be computed is determined from the bounds of the specified WritableRaster
. The specified WritableRaster
must have a SampleModel
that is compatible with this image. If outRaster
is null
, an appropriate WritableRaster
is created.copyData
in interface RenderedImage
outRaster
- a WritableRaster
to hold the returned part of the image, or null
WritableRaster
.public void setData(Raster r)
Raster r
, which is assumed to be in the same coordinate space as the BufferedImage
. The operation is clipped to the bounds of the BufferedImage
.setData
in interface WritableRenderedImage
r
- the specified Raster
public void addTileObserver(TileObserver to)
This method ignores its parameters and does nothing, since BufferedImage
is always checked out for writing and cannot be made read-only, so there can never be events to dispatch.
addTileObserver
in interface WritableRenderedImage
to
- the specified TileObserver
public void removeTileObserver(TileObserver to)
This method ignores the given observer, since addTileObserver(TileObserver)
adds none.
removeTileObserver
in interface WritableRenderedImage
to
- the specified TileObserver
.public boolean isTileWritable(int tileX, int tileY)
BufferedImage
is at (0,0) and it is always writable, so calling this method with (0,0) will always return true
, and any other coordinate will cause an exception to be thrown.isTileWritable
in interface WritableRenderedImage
tileX
- the x index of the tile.tileY
- the y index of the tile.true
if the tile specified by the specified indices is checked out for writing; false
otherwise.IllegalArgumentException
- if either tileX
or tileY
is not equal to 0public Point[] getWritableTileIndices()
Point
objects indicating which tiles are checked out for writing. Returns null
if none are checked out. Since a BufferedImage
consists of a single tile, and that tile is always checked out for writing, this method returns an array of one point. Further, the offset shall be consistent with getMinTileX()
and getMinTileY()
, which are always (0,0) in BufferedImage
. That will always be the coordinates of the single returned Point
.
getWritableTileIndices
in interface WritableRenderedImage
Point
array that indicates the tiles that are checked out for writing, or null
if no tiles are checked out for writing.public boolean hasTileWriters()
(getWritableTileIndices() != null).
hasTileWriters
in interface WritableRenderedImage
true
if any tile is checked out for writing; false
otherwise.public WritableRaster getWritableTile(int tileX, int tileY)
TileObservers
are notified when a tile goes from having no writers to having one writer. This method unconditionally returns the single tile without checking the passed values. No listeners are notified since the returned tile is always checked out for writing.
getWritableTile
in interface WritableRenderedImage
tileX
- the x index of the tiletileY
- the y index of the tileWritableRaster
that is the tile, indicated by the specified indices, to be checked out for writing.public void releaseWritableTile(int tileX, int tileY)
getWritableTile(int, int)
. Any other leads to undefined results. All registered TileObservers
are notified when a tile goes from having one writer to having no writers. This method immediately returns without checking the passed values. No listeners are notified since the single tile is always checked out for writing.
releaseWritableTile
in interface WritableRenderedImage
tileX
- the x index of the tiletileY
- the y index of the tilepublic int getTransparency()
getTransparency
in interface Transparency
BufferedImage
.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/image/BufferedImage.html