JAVA Program to move a circle based on mouse position

//Wherever we click on the screen the circle is displayed at those coordinates.

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

public class CircleViewer 
{

    private static final int CIRCLE_RADIUS = 30;
    private static final int FRAME_WIDTH = 300;
    private static final int FRAME_HEIGHT = 400;

    private MyCircle myCircle = new MyCircle();

    private int x = 0;
    private int y = 0;

    public static void main(String[] args)
     {
        CircleViewer circleViewer = new CircleViewer();
        circleViewer.run();
     }

    public void run()
{

        myCircle.addMouseListener(new MyCircleMouseListener());

        JFrame frame = new JFrame();
        frame.add(myCircle);

        frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

}

    class MyCircle extends JComponent
 {

        public void paintComponent(Graphics g) 
        {
            super.paintComponent(g);

            g.setColor(Color.BLUE);
            g.drawOval(x, y, CIRCLE_RADIUS, CIRCLE_RADIUS);
            g.fillOval(x, y, CIRCLE_RADIUS, CIRCLE_RADIUS);
        }
 }

    class MyCircleMouseListener implements MouseListener 
    {

        public void mouseClicked(MouseEvent e) 
        {
        }

        public void mousePressed(MouseEvent e)
         {
            x = e.getX();
            y = e.getY();
            myCircle.repaint();
         }

        public void mouseReleased(MouseEvent e) 
        {
        }

        public void mouseEntered(MouseEvent e) 
        {
        }

        public void mouseExited(MouseEvent e)
        {
        }
    }
}