GrayScale in Java Example

 import java.awt.*; 
 import java.applet.*; 
 import java.awt.image.*; 
 public class JavaExampleGrayScaleInApplet extends Applet 
   { 
     Image img,img1; 
     public void init() 
      { 
         img = getImage(getDocumentBase(),"Koala.jpg"); 
         int pxls[] = new int[248 * 248]; 
         PixelGrabber Pxlgrbr = new PixelGrabber(img, 0, 0, 248, 248, pxls, 0, 248); 
         try 
            { 
                Pxlgrbr.grabPixels(); 
            } 
                catch (InterruptedException e1) {} 
                for (int loop_indx = 0; loop_indx < 248 * 248; loop_indx++) 
                { 
                        int p1 = pxls[loop_indx]; 
                        int Red = (0xff & (p1 >> 16)); 
                        int Green = (0xff & (p1 >> 8)); 
                        int Blue = (0xff & p1); 
                        int Avg = (int) ((Red + Green + Blue) / 3); 
                        pxls[loop_indx] = (0xff000000 | Avg << 16 | Avg << 8 | Avg); 
                    } 
                        img1 = createImage(new MemoryImageSource(248, 248, pxls, 0 , 248)); 
       } 
                        public void paint(Graphics gr) 
                        { 
                           gr.drawImage(img1,10,10,this); 
                         } 
   } 
 /*<APPLET CODE=JavaExampleGrayScaleInApplet.class WIDTH=300 HEIGHT=300 ></APPLET> */