This is an approach to scaling an image in Java without the distortion that come from changing the aspect ratio. The source code is HERE

import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;

public class ImageScaler {
     * Scale an image while preserving aspect ratio
     @param args Name of image file to be scaled (testing only)
    public static void main(String[] args) throws Exception {
        BufferedImage in =[0]));
        BufferedImage out = ImageScaler.scaleImage(in,
                BufferedImage.TYPE_INT_RGB, 100200);
        javax.imageio.ImageIO.write(out, "JPG"new"scaled.jpg"));

     @param image The image to be scaled
     * @param imageType Target image type, e.g. TYPE_INT_RGB
     * @param newWidth The required width
     * @param newHeight The required width
     * @return The scaled image
    public static BufferedImage scaleImage(BufferedImage image, int imageType,
        int newWidth, int newHeight) {
        // Make sure the aspect ratio is maintained, so the image is not distorted
        double thumbRatio = (double) newWidth / (double) newHeight;
        int imageWidth = image.getWidth(null);
        int imageHeight = image.getHeight(null);
        double aspectRatio = (double) imageWidth / (double) imageHeight;

        if (thumbRatio < aspectRatio) {
            newHeight = (int) (newWidth / aspectRatio);
        } else {
            newWidth = (int) (newHeight * aspectRatio);

        // Draw the scaled image
        BufferedImage newImage = new BufferedImage(newWidth, newHeight,
        Graphics2D graphics2D = newImage.createGraphics();
        graphics2D.drawImage(image, 00, newWidth, newHeight, null);

        return newImage;