// Step 2: Add interaction
// The awt library
// Author: Carsten Schuermann

import javax.swing.JFrame;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class DotFrame extends JFrame {    
    public DotFrame(){
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 400);
        setTitle("DotFrame");

	class IC extends MouseAdapter {
	    public void mouseClicked(MouseEvent e) {
		drawDot( e.getX(), e.getY() );
	    }
	}

	class ICC extends MouseAdapter {
	    public void mouseClicked(MouseEvent e) {
		drawDot(10+ e.getX(), 1+e.getY() );
	    }
	}

        this.addMouseListener(new IC ());
	this.addMouseListener(new ICC ());
        setVisible(true);
    }
    
    private void drawDot(int x, int y) {
        getGraphics().fillOval(x-5, y-5,10,10);
    }
        
    public static void main(String[] args) {
        new DotFrame ();
    }
}