javax.swing

Class ImageIcon

Inhoudsopgave
  • All Implemented Interfaces:
    Serializable, Accessible, Icon

    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, 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 JavaBeansTM has been added to the java.beans package. Please see XMLEncoder.

    • Field Detail

      • component

        protected static final Component component

    • 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

        @ConstructorProperties(value="description")
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(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, or (as of 1.3) PNG. 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, or (as of 1.3) PNG
        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, or (as of 1.3) PNG. 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, or (as of 1.3) PNG
        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.

    • Method Detail

      • loadImage

        protected void loadImage(Image image)
        Loads the image, returning only when the image is loaded.
        Parameters:
        image - the image

      • getImage

        public Image getImage()
        Returns this icon's Image.
        Returns:
        the Image object for this ImageIcon

      • setImage

        public void setImage(Image image)
        Sets the image displayed by this icon.
        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.
        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);
        Parameters:
        observer - the image observer

      • getImageObserver

        public ImageObserver getImageObserver()
        Returns the image observer for the image.
        Returns:
        the image observer, which may be null

      • toString

        public String toString()
        Returns a string representation of this image.
        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
        Since:
        1.3

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Document heeft de 11/06/2005 gemaakt, de laatste keer de 04/03/2020 gewijzigd
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