Loading images as ThumbNail in java

private void createThumbnail(String filename, int thumbWidth, int thumbHeight, int quality, String outFilename)  throws InterruptedException,
FileNotFoundException, IOException   
{         // load image from filename   
 Image image = Toolkit.getDefaultToolkit().getImage(filename);
 MediaTracker mediaTracker = new MediaTracker(new Container()); 
 mediaTracker.addImage(image, 0); 
 mediaTracker.waitForID(0);
 // use this to test for errors at this point: 
 System.out.println(mediaTracker.isErrorAny());

 // determine thumbnail size from WIDTH and HEIGHT 
 double thumbRatio = (double)thumbWidth / (double)thumbHeight;    
 int imageWidth = image.getWidth(null);      
 int imageHeight = image.getHeight(null);  
 double imageRatio = (double)imageWidth / (double)imageHeight; 
 if (thumbRatio < imageRatio) 
 {             thumbHeight = (int)(thumbWidth / imageRatio);        
 } else 
 {             thumbWidth = (int)(thumbHeight * imageRatio); 
 }  

 // draw original image to thumbnail image object and  scale it to the new size on-the-fly 

 BufferedImage thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);  
 Graphics2D graphics2D = thumbImage.createGraphics(); 
 graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
 graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);

 // save thumbnail image to outFilename 
 BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(outFilename));      
  JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);   
  JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbImage);   
 quality = Math.max(0, Math.min(quality, 100)); 
 param.setQuality((float)quality / 100.0f, false);      
  encoder.setJPEGEncodeParam(param); 
 encoder.encode(thumbImage);
  out.close();  
}