Why can't I get my cards to move?

I have this piece of code up and running but I can't seem to get my cards to move. Is there something I am doing wrong? I was able to get them to show up front and back, and flip when I click on them. Why can't I get them to move? I thought I had the position updating. Any ideas? Thank you.

Driver.java

Code :

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package deckofcards;
 
import javax.swing.*;
 
public class Driver
{
	public static void main(String [] args)
	{
		//create a frame
		JFrame frame = new JFrame("Let's play with cards");
 
		//create a panel, put panel in frame
		CardPanel panel = new CardPanel();
		frame.getContentPane().add(panel);
 
		//make frame visible, set frame size
		frame.setVisible(true);
		frame.setSize(400,500);
	}
}

CardPanel.java

Code :

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package deckofcards;
 
/**
 *
 * @author Marlin
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
//CardPanel inherits from JPanel and implements MouseListener and MouseMotionListener interfaces
public class CardPanel extends JPanel implements MouseListener, MouseMotionListener {
 
    Card jack, queen, king;
    int mx, my;
 
    CardPanel() {
        //create 3 cards
        jack = new Card(11, "spade");
        queen = new Card(12, "spade");
        king = new Card(13, "spade");
 
        //set their locations (coordiante in the panel for display purposes)
        jack.setLocation(100, 100);
        queen.setLocation(200, 100);
        king.setLocation(300, 100);
 
        //set the cards front image
        jack.setImageIconFront(new ImageIcon("cards/js.gif"));
        queen.setImageIconFront(new ImageIcon("cards/qs.gif"));
        king.setImageIconFront(new ImageIcon("cards/ks.gif"));
 
        //set the cards back image
        jack.setImageIconBack(new ImageIcon("cards/b.gif"));
        queen.setImageIconBack(new ImageIcon("cards/b.gif"));
        king.setImageIconBack(new ImageIcon("cards/b.gif"));
 
 
        addMouseListener(this); //To detect "mouse clicked" events
        addMouseMotionListener(this); //to detect "mouse dragged" events
        setFocusable(true);
    }
 
    public void paintComponent(Graphics g) {
        //clear screen
        super.paintComponent(g);
 
        //draw the 3 cards
        jack.draw(g, this);
        queen.draw(g, this);
        king.draw(g, this);
    }
 
    /////////MouseListener methods///////////////////
    public void mouseClicked(MouseEvent me) {
        //check if click occurred on one of the cards, if so flip card
        if (jack.contains(me.getX(), me.getY())) {
            jack.flip();
        }
        if (queen.contains(me.getX(), me.getY())) {
            queen.flip();
        }
        if (king.contains(me.getX(), me.getY())) {
            king.flip();
        }
        repaint();
    }
 
    public void mouseEntered(MouseEvent me) {
    }
 
    public void mouseExited(MouseEvent me) {
    }
 
    @Override
    public void mousePressed(MouseEvent me) {
    }
 
    @Override
    public void mouseReleased(MouseEvent me) {
 
    }
    @Override
    public void mouseDragged(MouseEvent me) {
        mx = me.getX();
        my = me.getY();
}
 
    @Override
    public void mouseMoved(MouseEvent me) {
        mx = me.getX();
        my = me.getY();
    }
}

Card.java

Code :

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package deckofcards;
 
/**
 *
 * @author Marlin
 */
import javax.swing.*;
import java.awt.*;
 
//The rectangle class gives the object x and y coordiante variables, width and height variables,
//with getWidth(), getHeight() methods, etc.  Also, there is a very useful 'contains( ... )' method
//to determine if a point lies within a given rectangle.
public class Card extends Rectangle {
 
    //private attributes cannot be accessed outside of the class
    private String suit;
    private int number;
    //image for the front and back of the card
    private ImageIcon front;
    private ImageIcon back;
    //is the card face up or face down?
    private boolean faceup;
 
    //constructor
    Card() {
        suit = "joker";
        number = 0;
 
        faceup = false;
    }
 
    Card(int num, String s) {
        number = num;
        suit = s;
 
        faceup = false;
    }
 
    //flip card
    public void flip() {
        faceup = !faceup;
    }
 
    //assign a front image to card
    public void setImageIconFront(ImageIcon f) {
        front = f;
 
        width = front.getIconWidth();
        height = front.getIconHeight();
    }
 
    //assign a back image to card
    public void setImageIconBack(ImageIcon b) {
        back = b;
    }
 
//    move card to specified location
    @Override
    public void setLocation(int newX, int newY) {
        x = newX;
        y = newY;
    }
 
    //public 'get' method to get a private attribute
    public String getSuit() {
        return suit;
    }
 
    //public 'get' method for number
    public int getNumber() {
        return number;
    }
 
    // 11, 12, 13, 1 should say jack, queen, king, ace respectively
    public String toString() {
        String output = "";
 
        if (number == 1) {
            output += "ace";
        } else if (number == 11) {
            output += "jack";
        } else if (number == 12) {
            output += "queen";
        } else if (number == 13) {
            output += "king";
        } else {
            output += number;
        }
 
        output += " of " + suit + "s";
 
        return output;
    }
 
    //method that tells card how to draw itself
    public void draw(Graphics g, Component c) {
        if (faceup) {
            g.drawImage(front.getImage(), x, y, c);
        } else {
            g.drawImage(back.getImage(), x, y, c);
        }
    }
}