get image thumbnail : Image « 2D Graphics GUI « Java

1. Java
2. 2D Graphics GUI
3. Image

get image thumbnail

 
/**
 * 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";
    
    /**
     * get image thumbnail
     * @param imageFile
     */
    public static ImageIcon getImageThumbnail(File imageFile, int width, int height){
      ImageIcon thumbnail = null;
    if (imageFile != null && imageFile.isFile()) {
      ImageIcon tmpIcon = new ImageIcon(imageFile.getPath());
      if (tmpIcon != null) {
        if (tmpIcon.getIconWidth() > width) {
          int targetHeight = width/tmpIcon.getIconWidth()*tmpIcon.getIconHeight();
          if(targetHeight>height){
            targetHeight = height;
          } else {
            targetHeight = -1;
          }
          thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(width, targetHeight,Image.SCALE_AREA_AVERAGING));
        } else {
          thumbnail = tmpIcon;
        }
      }
    }
      return thumbnail;
    }
}

   
  

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