///////    Clicker.java    ///////
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.event.*;

public class Clicker extends Applet
{     
      public void init()
      {   addMouseListener(new ClickHandler(this)); }

      public void doClick()
      {   n++;  repaint();   }

      public void paint(Graphics g)
      {   g.drawRect(0, 0, getSize().width-1, getSize().height-1);
          g.drawString("  CLICK IN THIS BOX : " + n, 5, 30);
      }

      private int n = 0;
}

class ClickHandler extends MouseAdapter
{     ClickHandler(Clicker ap)
      {   app = ap;  }
      
      public void mouseClicked(MouseEvent e)
      {    app.doClick();  }

      private Clicker app;
}