import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class GrVaatleja1 extends JPanel implements MouseListener{
    Loendaja andmetalleti=new PiiksuvLoendaja();
    public GrVaatleja1(){
       addMouseListener(this);
    }
    public void mousePressed(MouseEvent e){
      andmetalleti.lisa();
    }
    public void mouseReleased(MouseEvent e){}
    public void mouseClicked(MouseEvent e){}
    public void mouseEntered(MouseEvent e){}
    public void mouseExited(MouseEvent e){}
    public static void main(String[] arg){
      JFrame f=new JFrame();
      f.getContentPane().add(new GrVaatleja1());
      f.setSize(300, 300);
      f.setVisible(true);
    }
}