Class java.awt.Image
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Class java.awt.Image
java.lang.Object
|
+----java.awt.Image
- public class Image
- extends Object
The image class is an abstract class. The image must be obtained in a
platform specific way.
-
UndefinedProperty
- The UndefinedProperty object should be returned whenever a
property which was not defined for a particular image is
fetched.
-
Image()
-
-
flush()
- Flushes all resources being used by this Image object.
-
getGraphics()
- Gets a graphics object to draw into this image.
-
getHeight(ImageObserver)
- Gets the actual height of the image.
-
getProperty(String, ImageObserver)
- Gets a property of the image by name.
-
getSource()
- Gets the object that produces the pixels for the image.
-
getWidth(ImageObserver)
- Gets the actual width of the image.
UndefinedProperty
public final static Object UndefinedProperty
- The UndefinedProperty object should be returned whenever a
property which was not defined for a particular image is
fetched.
Image
public Image()
getWidth
public abstract int getWidth(ImageObserver observer)
- Gets the actual width of the image. If the width is not known
yet then the ImageObserver will be notified later and -1 will
be returned.
- See Also:
- getHeight, ImageObserver
getHeight
public abstract int getHeight(ImageObserver observer)
- Gets the actual height of the image. If the height is not known
yet then the ImageObserver will be notified later and -1 will
be returned.
- See Also:
- getWidth, ImageObserver
getSource
public abstract ImageProducer getSource()
- Gets the object that produces the pixels for the image.
This is used by the Image filtering classes and by the
image conversion and scaling code.
- See Also:
- ImageProducer
getGraphics
public abstract Graphics getGraphics()
- Gets a graphics object to draw into this image.
This will only work for off-screen images.
- See Also:
- Graphics
getProperty
public abstract Object getProperty(String name,
ImageObserver observer)
- Gets a property of the image by name. Individual property names
are defined by the various image formats. If a property is not
defined for a particular image, then this method will return the
UndefinedProperty object. If the properties for this image are
not yet known, then this method will return null and the ImageObserver
object will be notified later. The property name "comment" should
be used to store an optional comment which can be presented to
the user as a description of the image, its source, or its author.
- See Also:
- ImageObserver, UndefinedProperty
flush
public abstract void flush()
- Flushes all resources being used by this Image object. This
includes any pixel data that is being cached for rendering to
the screen as well as any system resources that are being used
to store data or pixels for the image. The image is reset to
a state similar to when it was first created so that if it is
again rendered, the image data will have to be recreated or
fetched again from its source.
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