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javax.swing
Class ImageIcon
java.lang.Object
javax.swing.ImageIcon
-
All Implemented Interfaces:
-
Accessible
,
Icon
,
Serializable
-
public class
ImageIcon
-
extends
Object
-
implements
Icon
,
Serializable
,
Accessible
An implementation of the Icon interface that paints Icons from Images. Images that are created from a
URL,
URL or
filename
or byte array
are preloaded using MediaTracker to monitor the loaded state of the image.
For further information and examples of using image icons, see
How to Use Icons
in The Java Tutorial.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans
TM
has been added to the java.beans package. Please see
XMLEncoder
.
Nested Class Summary
|
protected class |
ImageIcon.AccessibleImageIcon
This class implements accessibility support for the ImageIcon class. |
Constructor Summary
|
ImageIcon
()
Creates an uninitialized image icon. |
ImageIcon
(byte[] imageData)
Creates an ImageIcon from an array of bytes which were read from an image file containing a supported image format, such as
GIF, JPEG,
GIF
or
(as of 1.3) PNG.
JPEG.
|
ImageIcon
(byte[] imageData,
String
Creates an ImageIcon from an array of bytes which were read from an image file containing a supported image format, such as
GIF, JPEG,
GIF
or
(as of 1.3) PNG.
JPEG.
|
ImageIcon
(
Image
image)
Creates an ImageIcon from an image object. |
ImageIcon
(
Image
image,
String
description)
Creates an ImageIcon from the image. |
ImageIcon
(
String
filename)
Creates an ImageIcon from the specified file. |
ImageIcon
(
String
filename,
String
description)
Creates an ImageIcon from the specified file. |
ImageIcon
(
URL
location)
Creates an ImageIcon from the specified URL. |
ImageIcon
(
URL
location,
String
description)
Creates an ImageIcon from the specified URL. |
component
protected static final Component component
tracker
protected static final MediaTracker tracker
ImageIcon
public ImageIcon(String filename,
String description)
-
Creates an ImageIcon from the specified file. The image will be preloaded by using MediaTracker to monitor the loading state of the image.
-
Parameters:
-
filename - the name of the file containing the image
-
description - a brief textual description of the image
-
See Also:
-
ImageIcon(String)
ImageIcon
public ImageIcon(String filename)
-
Creates an ImageIcon from the specified file. The image will be preloaded by using MediaTracker to monitor the loading state of the image. The specified String can be a file name or a file path. When specifying a path, use the Internet-standard forward-slash ("/") as a separator. (The string is converted to an URL, so the forward-slash works on all systems.) For example, specify:
new ImageIcon("images/myImage.gif")
The description is initialized to the filename string.
-
Parameters:
-
filename - a String specifying a filename or path
-
See Also:
-
getDescription()
ImageIcon
public ImageIcon(URL location,
String description)
-
Creates an ImageIcon from the specified URL. The image will be preloaded by using MediaTracker to monitor the loaded state of the image.
-
Parameters:
-
location - the URL for the image
-
description - a brief textual description of the image
-
See Also:
-
ImageIcon(String)
ImageIcon
public ImageIcon(URL location)
-
Creates an ImageIcon from the specified URL. The image will be preloaded by using MediaTracker to monitor the loaded state of the image. The icon's description is initialized to be a string representation of the URL.
-
Parameters:
-
location - the URL for the image
-
See Also:
-
getDescription()
ImageIcon
public ImageIcon(Image image,
String description)
-
Creates an ImageIcon from the image.
-
Parameters:
-
image - the image
-
description - a brief textual description of the image
ImageIcon
public ImageIcon(Image image)
-
Creates an ImageIcon from an image object. If the image has a "comment" property that is a string, then the string is used as the description of this icon.
-
Parameters:
-
image - the image
-
See Also:
-
getDescription()
,
Image.getProperty(java.lang.String, java.awt.image.ImageObserver)
ImageIcon
public ImageIcon(byte[] imageData,
String description)
-
Creates an ImageIcon from an array of bytes which were read from an image file containing a supported image format, such as
GIF, JPEG,
GIF
or
(as of 1.3) PNG.
JPEG.
Normally this array is created by reading an image using Class.getResourceAsStream(), but the byte array may also be statically stored in a class.
-
Parameters:
-
imageData - an array of pixels in an image format supported by the AWT Toolkit, such as
GIF, JPEG,
GIF
or
(as of 1.3) PNG
JPEG.
-
description - a brief textual description of the image
-
See Also:
-
Toolkit.createImage(java.lang.String)
ImageIcon
public ImageIcon(byte[] imageData)
-
Creates an ImageIcon from an array of bytes which were read from an image file containing a supported image format, such as
GIF, JPEG,
GIF
or
(as of 1.3) PNG.
JPEG.
Normally this array is created by reading an image using Class.getResourceAsStream(), but the byte array may also be statically stored in a class. If the resulting image has a "comment" property that is a string, then the string is used as the description of this icon.
-
Parameters:
-
imageData - an array of pixels in an image format supported by the AWT Toolkit, such as
GIF, JPEG,
GIF
or
(as of 1.3) PNG
JPEG
-
See Also:
-
Toolkit.createImage(java.lang.String)
,
getDescription()
,
Image.getProperty(java.lang.String, java.awt.image.ImageObserver)
ImageIcon
public ImageIcon()
-
Creates an uninitialized image icon.
loadImage
protected void loadImage(Image image)
-
Loads the image, returning only when the image is loaded.
-
-
-
Parameters:
-
image - the image
getImageLoadStatus
public int getImageLoadStatus()
-
Returns the status of the image loading operation.
-
-
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Returns:
-
the loading status as defined by java.awt.MediaTracker
-
See Also:
-
MediaTracker.ABORTED
,
MediaTracker.ERRORED
,
MediaTracker.COMPLETE
getImage
public Image getImage()
-
Returns this icon's Image.
-
-
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Returns:
-
the Image object for this ImageIcon
setImage
public void setImage(Image image)
-
Sets the image displayed by this icon.
-
-
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Parameters:
-
image - the image
getDescription
public String getDescription()
-
Gets the description of the image. This is meant to be a brief textual description of the object. For example, it might be presented to a blind user to give an indication of the purpose of the image. The description may be null.
-
-
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Returns:
-
a brief textual description of the image
setDescription
public void setDescription(String description)
-
Sets the description of the image. This is meant to be a brief textual description of the object. For example, it might be presented to a blind user to give an indication of the purpose of the image.
-
-
-
Parameters:
-
description - a brief textual description of the image
paintIcon
public void paintIcon(Component c,
Graphics g,
int x,
int y)
-
Paints the icon. The top-left corner of the icon is drawn at the point (x, y) in the coordinate space of the graphics context g. If this icon has no image observer, this method uses the c component as the observer.
-
-
Specified by:
-
paintIcon
in interface
Icon
-
-
Parameters:
-
c - the component to be used as the observer if this icon has no image observer
-
g - the graphics context
-
x - the X coordinate of the icon's top-left corner
-
y - the Y coordinate of the icon's top-left corner
getIconWidth
public int getIconWidth()
-
Gets the width of the icon.
-
-
Specified by:
-
getIconWidth
in interface
Icon
-
-
Returns:
-
the width in pixels of this icon
getIconHeight
public int getIconHeight()
-
Gets the height of the icon.
-
-
Specified by:
-
getIconHeight
in interface
Icon
-
-
Returns:
-
the height in pixels of this icon
setImageObserver
public void setImageObserver(ImageObserver observer)
-
Sets the image observer for the image. Set this property if the ImageIcon contains an animated GIF, so the observer is notified to update its display. For example:
icon = new ImageIcon(...)
button.setIcon(icon);
icon.setImageObserver(button);
-
-
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Parameters:
-
observer - the image observer
getImageObserver
public ImageObserver getImageObserver()
-
Returns the image observer for the image.
-
-
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Returns:
-
the image observer, which may be null
toString
public String toString()
-
Returns a string representation of this image.
-
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Overrides:
-
toString
in class
Object
-
-
Returns:
-
a string representing this image
getAccessibleContext
public AccessibleContext getAccessibleContext()
-
Gets the AccessibleContext associated with this ImageIcon. For image icons, the AccessibleContext takes the form of an AccessibleImageIcon. A new AccessibleImageIcon instance is created if necessary.
-
-
Specified by:
-
getAccessibleContext
in interface
Accessible
-
-
Returns:
-
an AccessibleImageIcon that serves as the AccessibleContext of this ImageIcon