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Create new image from source image

/**  * 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";     /**      * create new image from source image      * @param srcImg source image      * @param targetWidth target image width      * @param targetHeight target image height      * @return new image with specify width and height      */     public static BufferedImage createNewImage(BufferedImage srcImg,int targetWidth,int targetHeight){         BufferedImage targetImg = null;         int type = srcImg.getType();         if (type == BufferedImage.TYPE_CUSTOM) {             ColorModel cm = srcImg.getColorModel();             WritableRaster raster = cm.createCompatibleWritableRaster(targetWidth,                     targetHeight);             boolean alphaPremultiplied = cm.isAlphaPremultiplied();             targetImg = new BufferedImage(cm, raster, alphaPremultiplied, null);         } else {             targetImg = new BufferedImage(targetWidth, targetHeight, type);         }         return targetImg;     } }