Reading an image in java

package sandbox;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public class Main {

    public static void main(String[] args) {
        try {
            BufferedImage image = ImageIO.read(new File("c:\\alien.jpg"));

            Raster raster = image.getRaster();
            int[][] imagePixels = new int[image.getWidth()][image.getHeight()];
            for(int x = 0; x < image.getWidth(); ++x) {
                for(int y = 0; y < image.getHeight(); ++y) {

                    int pixel = 0;
                    int[] pixelData = raster.getPixel(x, y, new int[4]);

                    for(int i = 0; i < pixelData.length; ++i) {
                        pixel |= pixelData[i] << (i * 8);
                    }
                    //System.out.println(x + ", " + y + " = " + pixel);
                }
            }

        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}