I want to know alph, red, blue, and green values of pixels in buffered image. Following displays the picture correctly, But all red blue and green values are always zero.  Can anybody guide me how to get actual values :
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;

public class BuffIt {
  public static void main (String args[]) {
    // Get Image
    ImageIcon icon = new ImageIcon(args[0]);
    Image image = icon.getImage();
    int totval = 0;
    int picval;
        int rd, bl, gr;
    picval = 0;
        int i,j,w,h, clr;


    // Create empty BufferedImage, sized to Image
    BufferedImage buffImage =
      new BufferedImage(
          image.getWidth(null),
          image.getHeight(null),
          BufferedImage.TYPE_INT_ARGB);
        w = image.getWidth(null);
        h = image.getHeight(null);
        System.out.println("width : " + Integer.toString(w));
        System.out.println("height : " + Integer.toString(h));

        for (j=0;j<h;j++) {
        for (i=0;i<w;i++) {
        clr = buffImage.getRGB(i,j);
    rd   = (clr & 0x00ff0000) >> 16;
      gr = (clr & 0x0000ff00) >> 8;
      bl  =  clr & 0x000000ff;
        picval = ( picval + rd + gr + bl);
        if ( rd > 0 || gr > 0 || bl > 0 ) {
        System.out.println("red : " + Integer.toString(rd));
        System.out.println("green : " + Integer.toString(gr));
        System.out.println("blue : " + Integer.toString(bl));
        System.exit(0);
        }
    }
        }
        System.out.println("picval : " + Integer.toString(picval));
        totval = (totval + picval ) & 0xffffffff;
        System.out.println("totval: " + Integer.toString(totval));



    // Draw Image into BufferedImage
    Graphics g = buffImage.getGraphics();
    g.drawImage(image, 0, 0, null);

    // Show success
    JFrame frame = new JFrame();
    JLabel label = new JLabel(new ImageIcon(buffImage));
    frame.getContentPane().add(label);
    frame.pack();
    frame.show();
  }
}

Please help