Swing

Im having trouble getting started with swing. I have created the following,
but I cannot figure out how to paintComponent(Graphics g){ g.drawOval(x, y,
2, 2);}
um

import java.awt.GridLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import javax.swing.*;
import java.awt.*;
import java.awt.Graphics;

//import tutorial.MyDrawPanel;
/**
 * @author Shane Howearth
 */

public class Assignment2 extends JPanel implements MouseListener{
        int x1, y1, x2, y2;
        static JFrame jf;
        BlankArea blankArea;
        // eclipse complaint fix0red
        static final long serialVersionUID =0;
        
        public static void main(String[] args) {
        /* Use an appropriate Look and Feel */
        try {
           
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
        } catch (UnsupportedLookAndFeelException ex) {
            ex.printStackTrace();
        } catch (IllegalAccessException ex) {
            ex.printStackTrace();
        } catch (InstantiationException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        /* Turn off metal's use of bold fonts */
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        //Schedule a job for the event dispatch thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                drawGUI();
            }
        });
    }
        class MyDrawPanel extends JPanel{
                // eclipse complaint fix0red again
                static final long serialVersionUID =0;
        }
        static MyDrawPanel dp;
        //Draw our window
        
        
        
        static JComponent newContentPane;
        
        private static void drawGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("Regression Line");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        //Create and set up the content pane.
        newContentPane = new Assignment2();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);
        frame.setPreferredSize(new Dimension(500,500));
        
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }
    
        //mouse events
        public Assignment2() {
        super(new GridLayout(0,1));
        blankArea = new BlankArea(Color.WHITE);
        add(blankArea);
        //Register for mouse events on blankArea and the panel.
        blankArea.addMouseListener(this);
        addMouseListener(this);
        setPreferredSize(new Dimension(450, 450));
        setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
    }
        
        void eventOutput(String eventDescription, MouseEvent e) {
    }
        
        public void mousePressed(MouseEvent e) {
    }
    
    public void mouseReleased(MouseEvent e) {
    }
    
    public void mouseEntered(MouseEvent e) {
    }
    
    public void mouseExited(MouseEvent e) {
    }
    
        int x, y;
        //Grab the x and y of where the mouse is clicked
        
    public void mouseClicked(MouseEvent e) {
       // eventOutput("Mouse clicked (# of clicks: "
               // + e.getClickCount() + ")", e);
        x = e.getX();
        y = e.getY();
        

        dp.repaint();
        
    };
    
}

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