Java Platform 1.2

javax.swing
Class ImageIcon

java.lang.Object
  |
  +--javax.swing.ImageIcon

public class ImageIcon
extends Object
implements Icon, Serializable

An implementation of the Icon interface that paints Icons from Images. Images that are created from a URL or filename are preloaded using MediaTracker to monitor the loaded state of the image.

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. A future release of Swing will provide support for long term persistence.

See Also:
Serialized Form

Field Summary
protected static Component component
           
protected static MediaTracker tracker
           
 
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 or JPEG.
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 or 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.
 
Method Summary
 String getDescription()
          Get the description of the image.
 int getIconHeight()
          Get the height of the Icon
 int getIconWidth()
          Get the width of the Icon
 Image getImage()
          Returns the Icon's Image
 int getImageLoadStatus()
          Returns the status of the image loading operation.
 ImageObserver getImageObserver()
          Return the umage observer for the image
protected  void loadImage(Image image)
          Wait for the image to load
 void paintIcon(Component c, Graphics g, int x, int y)
          Paints the Icon
 void setDescription(String description)
          Set the description of the image.
 void setImage(Image image)
          Set the image displayed by this icon.
 void setImageObserver(ImageObserver observer)
          Set the image observer for the image.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

component

protected static final Component component

tracker

protected static final MediaTracker tracker
Constructor Detail

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. For example, specify:
    new ImageIcon("images/myImage.gif")
 
(The string is converted to an URL, so the forward-slash works on all systems.)
Parameters:
filename - a String specifying a filename or path

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:
URL - 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.

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.

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 or 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 or 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 or 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:
an - array of pixels in an image format supported by the AWT Toolkit, such as GIF or JPEG.
See Also:
Toolkit.createImage(java.lang.String)

ImageIcon

public ImageIcon()
Creates an uninitialized image icon.
Method Detail

loadImage

protected void loadImage(Image image)
Wait for the image to load

getImageLoadStatus

public int getImageLoadStatus()
Returns the status of the image loading operation.
Returns:
the loading status as defined by java.awt.MediaTracker.
See Also:
MediaTracker.ABORTED, MediaTracker.ERRORED, MediaTracker.COMPLETE

getImage

public Image getImage()
Returns the Icon's Image

setImage

public void setImage(Image image)
Set the image displayed by this icon.

getDescription

public String getDescription()
Get 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.

setDescription

public void setDescription(String description)
Set 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.

paintIcon

public void paintIcon(Component c,
                      Graphics g,
                      int x,
                      int y)
Paints the Icon
Specified by:
paintIcon in interface Icon

getIconWidth

public int getIconWidth()
Get the width of the Icon
Specified by:
getIconWidth in interface Icon

getIconHeight

public int getIconHeight()
Get the height of the Icon
Specified by:
getIconHeight in interface Icon

setImageObserver

public void setImageObserver(ImageObserver observer)
Set 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);
 

getImageObserver

public ImageObserver getImageObserver()
Return the umage observer for the image

Java Platform 1.2

Submit a bug or feature Version 1.2 of Java Platform API Specification
Java is a trademark or registered trademark of Sun Microsystems, Inc. in the US and other countries.
Copyright 1993-1998 Sun Microsystems, Inc. 901 San Antonio Road,
Palo Alto, California, 94303, U.S.A. All Rights Reserved.