import java.awt.*;


public class communicationDemo extends java.applet.Applet {

Image pixelImage;
StringBuffer mouseStroke;

   public void init(){
          pixelImage = createImage(512,512);  
   }
   
   public boolean mouseDown(Event evt, int x, int y){
          mouseStroke = new StringBuffer();
          mouseStroke.append(x+","+y+",");
          return true;
   }
   
   public boolean mouseDrag(Event evt, int x, int y){
         mouseStroke.append(x+","+y+",");
   		 return true;
   }
   
   public boolean mouseUp(Event evt, int x, int y){
         System.out.println(mouseStroke);
         return true;
   }
   
   public void update(Graphics g){
         paint(g);
   }
   
   public void paint(Graphics g){
   	     g.drawImage(pixelImage,0,0,this);
   
   }
}

/*

Now we have created a storage buffer for the coordinates on our mouse stroke.
The list of points (x and y pairs) will be printed to the terminal each time
we lift the mouse button after dragging it around in the applet window.
   

*/