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Check if image supported

/**  * COPYRIGHT. Harry Wu 2010. ALL RIGHTS RESERVED.  * Project: EasyPhoto  * Author: Harry Wu <harrywu304@gmail.com>  * Created On: Jun 28, 2008 5:12:21 PM  *  */ //package org.shaitu.easyphoto.util; import java.awt.Image; import java.awt.image.BufferedImage; import java.awt.image.ColorModel; import java.awt.image.IndexColorModel; import java.awt.image.WritableRaster; import java.io.File; import java.util.Iterator; import java.util.List; import javax.imageio.IIOImage; import javax.imageio.ImageIO; import javax.imageio.ImageTypeSpecifier; import javax.imageio.ImageWriteParam; import javax.imageio.ImageWriter; import javax.imageio.plugins.jpeg.JPEGImageWriteParam; import javax.imageio.stream.ImageOutputStream; import javax.swing.ImageIcon; /**  * userful methods about image  * @author harry  */ public class ImageUtil {     public final static String JPEG = "jpeg";     public final static String JPG = "jpg";     public final static String BMP = "bmp";     public final static String PNG = "png";     public final static String GIF = "gif";     public final static String TIFF = "tiff";     public final static String TIF = "tif";          /**      * check if image supported      * @param extName extension name of image file      * @return true supported, else false      */     public static boolean isSupportedImage(String extName) {         boolean isSupported = false;         for (String format : ImageIO.getReaderFormatNames()) {             if (format.equalsIgnoreCase(extName)) {                 isSupported = true;                 break;             }         }         return isSupported;     } }