import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

class Canvas extends JComponent {
   class Circle { float x, y, r; Color col; }
   java.util.Vector<Circle> circles 
		= new java.util.Vector<Circle>();
   Circle current;
	
   public Canvas() {
      setOpaque(true);
      setBackground(Color.white);
       addMouseListener(new MouseAdapter() {
       	public void mousePressed(MouseEvent e) {
       		current = new Circle();
       		current.x = e.getX();
       		current.y = e.getY();
       		current.col = CirclePaint.colorChooser.getColor();
       	}
       	public void mouseReleased(MouseEvent e) {
        	if(current!=null) circles.add(current); }
       	public void mouseExited(MouseEvent e) { current = null; }
       });
       addMouseMotionListener(new MouseMotionAdapter() {
       	public void mouseDragged(MouseEvent e) {
       		if(current==null) return;
       		current.r =  (float)Math.sqrt(
       		     (e.getX() - current.x) * (e.getX() - current.x) 
       		   + (e.getY() - current.y) * (e.getY() - current.y));
       		repaint();
       	}
       });
	}

public void paintComponent(Graphics g) {
	g.clearRect(0, 0, this.getWidth(), this.getHeight());
	for(Circle c : circles) {
		g.setColor(c.col);
		((Graphics2D)g).fill((Shape)new 			java.awt.geom.Ellipse2D.Float(
		  c.x-c.r, c.y-c.r, 2*c.r, 2*c.r));
	}
	if(current!=null) {
		g.setColor(current.col);
		((Graphics2D)g).fill((Shape)new 	java.awt.geom.Ellipse2D.Float(
		  current.x-current.r, current.y-current.r, 		  2*current.r, 2*current.r));
	}
}}

public class CirclePaint {
	public static JColorChooser colorChooser
	= new JColorChooser();

	public static void main(String[] args) {
		JFrame frame1 = new JFrame("Choose the Color");
		frame1.setSize(450, 260);
		frame1.setDefaultCloseOperation(
		JFrame.EXIT_ON_CLOSE);
		frame1.getContentPane().add(colorChooser);
		frame1.setVisible(true);
		
		JFrame frame2 = new JFrame("Draw Circles Here");
		frame2.setSize(300, 300);
		frame2.getContentPane().add(new Canvas());
		frame2.setVisible(true);
	}
 }