(Java)How to change picture(War Card Game)

Question

Ok what im trying to do is make a image called hidden and it will be a card face down. Now I want to make it so the image will change to a face up card and what i tried to do was make a image for six cards three for each team. "p1, p2, p3" and "o1, o2, o3" those are the names I gave the cards face down and i want the hidden JLabel to change or equal those and then change to a face up card I only put this part of the code because i thought thats all you need but if you need to see more of the code i can put it here. Any help would be appreciated.

public class Cards {

static int[] fullDeck = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 52, 51, 50, 49, 48,
    47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31,
    30, 29, 28, 27, };
static int oDeck;
static int pDeck;
static int pTurn;
static int oTurn;

private JFrame frame;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                Cards window = new Cards();
                window.frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the application.
 */
public Cards() {
    initialize();
}

/**
 * Initialize the contents of the frame.
 */
private void initialize() {
    frame = new JFrame();
    frame.setBounds(100, 100, 450, 300);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(null);
    JLabel hidden = new JLabel("");

    JLabel p1 = new JLabel("New label");
    p1.setBounds(47, 24, 82, 82);
    frame.getContentPane().add(p1);

    JLabel p2 = new JLabel("New label");
    p2.setBounds(139, 24, 82, 82);
    frame.getContentPane().add(p2);

    JLabel p3 = new JLabel("New label");
    p3.setBounds(211, 24, 82, 82);
    frame.getContentPane().add(p3);

    JLabel o1 = new JLabel("New label");
    o1.setBounds(47, 95, 82, 82);
    frame.getContentPane().add(o1);

    JLabel o2 = new JLabel("New label");
    o2.setBounds(139, 95, 82, 82);
    frame.getContentPane().add(o2);

    JLabel o3 = new JLabel("New label");
    o3.setBounds(211, 95, 82, 82);
    frame.getContentPane().add(o3);

    //This creates the players hand and the opponents hand
            ArrayList<Integer> playerDeck = new ArrayList<>();
            ArrayList<Integer> opponentDeck = new ArrayList<>();

            for (int i = 0; i <= fullDeck.length; i++) {
                if (i % 2 == 0) {
                    playerDeck.add(i);
                } else {
                    opponentDeck.add(i);
                }
                Collections.shuffle(playerDeck);
                Collections.shuffle(opponentDeck);

    JButton btnNewButton = new JButton("New button");
    btnNewButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {for (int i = 0; i < 4; i++) {
            /*if (i == 1){
                pDeck = playerDeck.get(1);
             hidden = p1;
            hidden.setBounds(20, 200, 106, 61);
            System.out.println("Check1");
            }
            else if (i == 2){
                pDeck = playerDeck.get(2);
                hidden = p2;
                hidden.setBounds(162, 200, 106, 61);
                System.out.println("Check2");
            }
            else if (i == 3){
                pDeck = playerDeck.get(3);
                hidden = p3;
                System.out.println("Check3");
            }*/
            pDeck = playerDeck.get(1);
             hidden = p1;
            switch (pDeck) {
            case 1:
                Image img = new ImageIcon(this.getClass()
                        .getResource("/bin/1.png")).getImage();
                hidden.setIcon(new ImageIcon(img));
                pTurn = 14;
                break;
            case 2:
                Image img2 = new ImageIcon(this.getClass()
                        .getResource("/bin/2.png")).getImage();
                hidden.setIcon(new ImageIcon(img2));
                pTurn = 14;
                break;
            case 3:
                Image img3 = new ImageIcon(this.getClass()
                        .getResource("/bin/3.png")).getImage();
                hidden.setIcon(new ImageIcon(img3));
                pTurn = 14;
                break;
            case 4:
                Image img4 = new ImageIcon(this.getClass()
                        .getResource("/bin/4.png")).getImage();
                hidden.setIcon(new ImageIcon(img4));
                pTurn = 14;
                break;
            case 5:
                Image img5 = new ImageIcon(this.getClass()
                        .getResource("/bin/5.png")).getImage();
                hidden.setIcon(new ImageIcon(img5));
                pTurn = 13;
                break;
            case 6:
                Image img6 = new ImageIcon(this.getClass()
                        .getResource("/bin/6.png")).getImage();
                hidden.setIcon(new ImageIcon(img6));
                pTurn = 13;
            case 7:
                Image img7 = new ImageIcon(this.getClass()
                        .getResource("/bin/7.png")).getImage();
                hidden.setIcon(new ImageIcon(img7));
                pTurn = 13;
                break;
            case 8:
                Image img8 = new ImageIcon(this.getClass()
                        .getResource("/bin/8.png")).getImage();
                hidden.setIcon(new ImageIcon(img8));
                pTurn = 13;
                break;
            case 9:
                Image img9 = new ImageIcon(this.getClass()
                        .getResource("/bin/9.png")).getImage();
                hidden.setIcon(new ImageIcon(img9));
                pTurn = 12;
                break;
            case 10:
                Image img10 = new ImageIcon(this.getClass()
                        .getResource("/bin/10.png")).getImage();
                hidden.setIcon(new ImageIcon(img10));
                pTurn = 12;
                break;
            case 11:
                Image img11 = new ImageIcon(this.getClass()
                        .getResource("/bin/11.png")).getImage();
                hidden.setIcon(new ImageIcon(img11));
                pTurn = 12;
                break;
            case 12:
                Image img12 = new ImageIcon(this.getClass()
                        .getResource("/bin/12.png")).getImage();
                hidden.setIcon(new ImageIcon(img12));
                pTurn = 12;
                break;
            case 13:
                Image img13 = new ImageIcon(this.getClass()
                        .getResource("/bin/13.png")).getImage();
                hidden.setIcon(new ImageIcon(img13));
                pTurn = 11;
                break;
            case 14:
                Image img14 = new ImageIcon(this.getClass()
                        .getResource("/bin/14.png")).getImage();
                hidden.setIcon(new ImageIcon(img14));
                pTurn = 11;
                break;
            case 15:
                Image img15 = new ImageIcon(this.getClass()
                        .getResource("/bin/15.png")).getImage();
                hidden.setIcon(new ImageIcon(img15));
                pTurn = 11;
                break;
            case 16:
                Image img16 = new ImageIcon(this.getClass()
                        .getResource("/bin/16.png")).getImage();
                hidden.setIcon(new ImageIcon(img16));
                pTurn = 11;
                break;
            case 17:
                Image img17 = new ImageIcon(this.getClass()
                        .getResource("/bin/17.png")).getImage();
                hidden.setIcon(new ImageIcon(img17));
                pTurn = 10;
                break;
            case 18:
                Image img18 = new ImageIcon(this.getClass()
                        .getResource("/bin/18.png")).getImage();
                hidden.setIcon(new ImageIcon(img18));
                pTurn = 10;
                break;
            case 19:
                Image img19 = new ImageIcon(this.getClass()
                        .getResource("/bin/19.png")).getImage();
                hidden.setIcon(new ImageIcon(img19));
                pTurn = 10;
                break;
            case 20:
                Image img20 = new ImageIcon(this.getClass()
                        .getResource("/bin/20.png")).getImage();
                hidden.setIcon(new ImageIcon(img20));
                pTurn = 10;
                break;
            case 21:
                Image img21 = new ImageIcon(this.getClass()
                        .getResource("/bin/21.png")).getImage();
                hidden.setIcon(new ImageIcon(img21));
                pTurn = 9;
                break;
            case 22:
                Image img22 = new ImageIcon(this.getClass()
                        .getResource("/bin/22.png")).getImage();
                hidden.setIcon(new ImageIcon(img22));
                pTurn = 9;
                break;
            case 23:
                Image img23 = new ImageIcon(this.getClass()
                        .getResource("/bin/23.png")).getImage();
                hidden.setIcon(new ImageIcon(img23));
                pTurn = 9;
                break;
            case 24:
                Image img24 = new ImageIcon(this.getClass()
                        .getResource("/bin/24.png")).getImage();
                hidden.setIcon(new ImageIcon(img24));
                pTurn = 9;
                break;
            case 25:
                Image img25 = new ImageIcon(this.getClass()
                        .getResource("/bin/25.png")).getImage();
                hidden.setIcon(new ImageIcon(img25));
                pTurn = 8;
                break;
            case 26:
                Image img26 = new ImageIcon(this.getClass()
                        .getResource("/bin/26.png")).getImage();
                hidden.setIcon(new ImageIcon(img26));
                pTurn = 8;
                break;
            case 27:
                Image img27 = new ImageIcon(this.getClass()
                        .getResource("/bin/27.png")).getImage();
                hidden.setIcon(new ImageIcon(img27));
                pTurn = 8;
                break;
            case 28:
                Image img28 = new ImageIcon(this.getClass()
                        .getResource("/bin/28.png")).getImage();
                hidden.setIcon(new ImageIcon(img28));
                pTurn = 8;
                break;
            case 29:
                Image img29 = new ImageIcon(this.getClass()
                        .getResource("/bin/29.png")).getImage();
                hidden.setIcon(new ImageIcon(img29));
                pTurn = 7;
                break;
            case 30:
                Image img30 = new ImageIcon(this.getClass()
                        .getResource("/bin/30.png")).getImage();
                hidden.setIcon(new ImageIcon(img30));
                pTurn = 7;
                break;
            case 31:
                Image img31 = new ImageIcon(this.getClass()
                        .getResource("/bin/31.png")).getImage();
                hidden.setIcon(new ImageIcon(img31));
                pTurn = 7;
                break;
            case 32:
                Image img32 = new ImageIcon(this.getClass()
                        .getResource("/bin/32.png")).getImage();
                hidden.setIcon(new ImageIcon(img32));
                pTurn = 7;
                break;
            case 33:
                Image img33 = new ImageIcon(this.getClass()
                        .getResource("/bin/33.png")).getImage();
                hidden.setIcon(new ImageIcon(img33));
                pTurn = 6;
                break;
            case 34:
                Image img34 = new ImageIcon(this.getClass()
                        .getResource("/bin/34.png")).getImage();
                hidden.setIcon(new ImageIcon(img34));
                pTurn = 6;
                break;
            case 35:
                Image img35 = new ImageIcon(this.getClass()
                        .getResource("/bin/35.png")).getImage();
                hidden.setIcon(new ImageIcon(img35));
                pTurn = 6;
                break;
            case 36:
                Image img36 = new ImageIcon(this.getClass()
                        .getResource("/bin/36.png")).getImage();
                hidden.setIcon(new ImageIcon(img36));
                pTurn = 6;
                break;
            case 37:
                Image img37 = new ImageIcon(this.getClass()
                        .getResource("/bin/37.png")).getImage();
                hidden.setIcon(new ImageIcon(img37));
                pTurn = 5;
                break;
            case 38:
                Image img38 = new ImageIcon(this.getClass()
                        .getResource("/bin/38.png")).getImage();
                hidden.setIcon(new ImageIcon(img38));
                pTurn = 5;
                break;
            case 39:
                Image img39 = new ImageIcon(this.getClass()
                        .getResource("/bin/39.png")).getImage();
                hidden.setIcon(new ImageIcon(img39));
                pTurn = 5;
                break;
            case 40:
                Image img40 = new ImageIcon(this.getClass()
                        .getResource("/bin/40.png")).getImage();
                hidden.setIcon(new ImageIcon(img40));
                pTurn = 5;
                break;
            case 41:
                Image img41 = new ImageIcon(this.getClass()
                        .getResource("/bin/41.png")).getImage();
                hidden.setIcon(new ImageIcon(img41));
                pTurn = 4;
                break;
            case 42:
                Image img42 = new ImageIcon(this.getClass()
                        .getResource("/bin/42.png")).getImage();
                hidden.setIcon(new ImageIcon(img42));
                pTurn = 4;
                break;
            case 43:
                Image img43 = new ImageIcon(this.getClass()
                        .getResource("/bin/43.png")).getImage();
                hidden.setIcon(new ImageIcon(img43));
                pTurn = 4;
                break;
            case 44:
                Image img44 = new ImageIcon(this.getClass()
                        .getResource("/bin/44.png")).getImage();
                hidden.setIcon(new ImageIcon(img44));
                pTurn = 4;
                break;
            case 45:
                Image img45 = new ImageIcon(this.getClass()
                        .getResource("/bin/45.png")).getImage();
                hidden.setIcon(new ImageIcon(img45));
                pTurn = 3;
                break;
            case 46:
                Image img46 = new ImageIcon(this.getClass()
                        .getResource("/bin/46.png")).getImage();
                hidden.setIcon(new ImageIcon(img46));
                pTurn = 3;
                break;
            case 47:
                Image img47 = new ImageIcon(this.getClass()
                        .getResource("/bin/47.png")).getImage();
                hidden.setIcon(new ImageIcon(img47));
                pTurn = 3;
                break;
            case 48:
                Image img48 = new ImageIcon(this.getClass()
                        .getResource("/bin/48.png")).getImage();
                hidden.setIcon(new ImageIcon(img48));
                pTurn = 3;
                break;
            case 49:
                Image img49 = new ImageIcon(this.getClass()
                        .getResource("/bin/49.png")).getImage();
                hidden.setIcon(new ImageIcon(img49));
                pTurn = 2;
                break;
            case 50:
                Image img50 = new ImageIcon(this.getClass()
                        .getResource("/bin/50.png")).getImage();
                hidden.setIcon(new ImageIcon(img50));
                pTurn = 2;
                break;
            case 51:
                Image img51 = new ImageIcon(this.getClass()
                        .getResource("/bin/51.png")).getImage();
                hidden.setIcon(new ImageIcon(img51));
                pTurn = 2;
                break;
            case 52:
                Image img52 = new ImageIcon(this.getClass()
                        .getResource("/bin/52.png")).getImage();
                hidden.setIcon(new ImageIcon(img52));
                pTurn = 2;
                break;

            default:
            }
            if (i == 1){
                oDeck = opponentDeck.get(1);
                JLabel hidden = o1;
                }
                else if (i == 2){
                    oDeck = opponentDeck.get(2);
                    JLabel hidden = o2;
                }
                else if (i == 3){
                    oDeck = opponentDeck.get(3);
                    JLabel hidden = o3;
                }


            switch (oDeck) {
            case 1:
                Image img = new ImageIcon(this.getClass()
                        .getResource("/bin/1.png")).getImage();
                hidden.setIcon(new ImageIcon(img));
                oTurn = 14;
                break;
            case 2:
                Image img2 = new ImageIcon(this.getClass()
                        .getResource("/bin/2.png")).getImage();
                hidden.setIcon(new ImageIcon(img2));
                oTurn = 14;
                break;
            case 3:
                Image img3 = new ImageIcon(this.getClass()
                        .getResource("/bin/3.png")).getImage();
                hidden.setIcon(new ImageIcon(img3));
                oTurn = 14;
                break;
            case 4:
                Image img4 = new ImageIcon(this.getClass()
                        .getResource("/bin/4.png")).getImage();
                hidden.setIcon(new ImageIcon(img4));
                oTurn = 14;
                break;
            case 5:
                Image img5 = new ImageIcon(this.getClass()
                        .getResource("/bin/5.png")).getImage();
                hidden.setIcon(new ImageIcon(img5));
                oTurn = 13;
                break;
            case 6:
                Image img6 = new ImageIcon(this.getClass()
                        .getResource("/bin/6.png")).getImage();
                hidden.setIcon(new ImageIcon(img6));
                oTurn = 13;
            case 7:
                Image img7 = new ImageIcon(this.getClass()
                        .getResource("/bin/7.png")).getImage();
                hidden.setIcon(new ImageIcon(img7));
                oTurn = 13;
                break;
            case 8:
                Image img8 = new ImageIcon(this.getClass()
                        .getResource("/bin/8.png")).getImage();
                hidden.setIcon(new ImageIcon(img8));
                oTurn = 13;
                break;
            case 9:
                Image img9 = new ImageIcon(this.getClass()
                        .getResource("/bin/9.png")).getImage();
                hidden.setIcon(new ImageIcon(img9));
                oTurn = 12;
                break;
            case 10:
                Image img10 = new ImageIcon(this.getClass()
                        .getResource("/bin/10.png")).getImage();
                hidden.setIcon(new ImageIcon(img10));
                oTurn = 12;
                break;
            case 11:
                Image img11 = new ImageIcon(this.getClass()
                        .getResource("/bin/11.png")).getImage();
                hidden.setIcon(new ImageIcon(img11));
                oTurn = 12;
                break;
            case 12:
                Image img12 = new ImageIcon(this.getClass()
                        .getResource("/bin/12.png")).getImage();
                hidden.setIcon(new ImageIcon(img12));
                oTurn = 12;
                break;
            case 13:
                Image img13 = new ImageIcon(this.getClass()
                        .getResource("/bin/13.png")).getImage();
                hidden.setIcon(new ImageIcon(img13));
                oTurn = 11;
                break;
            case 14:
                Image img14 = new ImageIcon(this.getClass()
                        .getResource("/bin/14.png")).getImage();
                hidden.setIcon(new ImageIcon(img14));
                oTurn = 11;
                break;
            case 15:
                Image img15 = new ImageIcon(this.getClass()
                        .getResource("/bin/15.png")).getImage();
                hidden.setIcon(new ImageIcon(img15));
                oTurn = 11;
                break;
            case 16:
                Image img16 = new ImageIcon(this.getClass()
                        .getResource("/bin/16.png")).getImage();
                hidden.setIcon(new ImageIcon(img16));
                oTurn = 11;
                break;
            case 17:
                Image img17 = new ImageIcon(this.getClass()
                        .getResource("/bin/17.png")).getImage();
                hidden.setIcon(new ImageIcon(img17));
                oTurn = 10;
                break;
            case 18:
                Image img18 = new ImageIcon(this.getClass()
                        .getResource("/bin/18.png")).getImage();
                hidden.setIcon(new ImageIcon(img18));
                oTurn = 10;
                break;
            case 19:
                Image img19 = new ImageIcon(this.getClass()
                        .getResource("/bin/19.png")).getImage();
                hidden.setIcon(new ImageIcon(img19));
                oTurn = 10;
                break;
            case 20:
                Image img20 = new ImageIcon(this.getClass()
                        .getResource("/bin/20.png")).getImage();
                hidden.setIcon(new ImageIcon(img20));
                oTurn = 10;
                break;
            case 21:
                Image img21 = new ImageIcon(this.getClass()
                        .getResource("/bin/21.png")).getImage();
                hidden.setIcon(new ImageIcon(img21));
                oTurn = 9;
                break;
            case 22:
                Image img22 = new ImageIcon(this.getClass()
                        .getResource("/bin/22.png")).getImage();
                hidden.setIcon(new ImageIcon(img22));
                oTurn = 9;
                break;
            case 23:
                Image img23 = new ImageIcon(this.getClass()
                        .getResource("/bin/23.png")).getImage();
                hidden.setIcon(new ImageIcon(img23));
                oTurn = 9;
                break;
            case 24:
                Image img24 = new ImageIcon(this.getClass()
                        .getResource("/bin/24.png")).getImage();
                hidden.setIcon(new ImageIcon(img24));
                oTurn = 9;
                break;
            case 25:
                Image img25 = new ImageIcon(this.getClass()
                        .getResource("/bin/25.png")).getImage();
                hidden.setIcon(new ImageIcon(img25));
                oTurn = 8;
                break;
            case 26:
                Image img26 = new ImageIcon(this.getClass()
                        .getResource("/bin/26.png")).getImage();
                hidden.setIcon(new ImageIcon(img26));
                oTurn = 8;
                break;
            case 27:
                Image img27 = new ImageIcon(this.getClass()
                        .getResource("/bin/27.png")).getImage();
                hidden.setIcon(new ImageIcon(img27));
                oTurn = 8;
                break;
            case 28:
                Image img28 = new ImageIcon(this.getClass()
                        .getResource("/bin/28.png")).getImage();
                hidden.setIcon(new ImageIcon(img28));
                oTurn = 8;
                break;
            case 29:
                Image img29 = new ImageIcon(this.getClass()
                        .getResource("/bin/29.png")).getImage();
                hidden.setIcon(new ImageIcon(img29));
                oTurn = 7;
                break;
            case 30:
                Image img30 = new ImageIcon(this.getClass()
                        .getResource("/bin/30.png")).getImage();
                hidden.setIcon(new ImageIcon(img30));
                oTurn = 7;
                break;
            case 31:
                Image img31 = new ImageIcon(this.getClass()
                        .getResource("/bin/31.png")).getImage();
                hidden.setIcon(new ImageIcon(img31));
                oTurn = 7;
                break;
            case 32:
                Image img32 = new ImageIcon(this.getClass()
                        .getResource("/bin/32.png")).getImage();
                hidden.setIcon(new ImageIcon(img32));
                oTurn = 7;
                break;
            case 33:
                Image img33 = new ImageIcon(this.getClass()
                        .getResource("/bin/33.png")).getImage();
                hidden.setIcon(new ImageIcon(img33));
                oTurn = 6;
                break;
            case 34:
                Image img34 = new ImageIcon(this.getClass()
                        .getResource("/bin/34.png")).getImage();
                hidden.setIcon(new ImageIcon(img34));
                oTurn = 6;
                break;
            case 35:
                Image img35 = new ImageIcon(this.getClass()
                        .getResource("/bin/35.png")).getImage();
                hidden.setIcon(new ImageIcon(img35));
                oTurn = 6;
                break;
            case 36:
                Image img36 = new ImageIcon(this.getClass()
                        .getResource("/bin/36.png")).getImage();
                hidden.setIcon(new ImageIcon(img36));
                oTurn = 6;
                break;
            case 37:
                Image img37 = new ImageIcon(this.getClass()
                        .getResource("/bin/37.png")).getImage();
                hidden.setIcon(new ImageIcon(img37));
                oTurn = 5;
                break;
            case 38:
                Image img38 = new ImageIcon(this.getClass()
                        .getResource("/bin/38.png")).getImage();
                hidden.setIcon(new ImageIcon(img38));
                oTurn = 5;
                break;
            case 39:
                Image img39 = new ImageIcon(this.getClass()
                        .getResource("/bin/39.png")).getImage();
                hidden.setIcon(new ImageIcon(img39));
                oTurn = 5;
                break;
            case 40:
                Image img40 = new ImageIcon(this.getClass()
                        .getResource("/bin/40.png")).getImage();
                hidden.setIcon(new ImageIcon(img40));
                oTurn = 5;
                break;
            case 41:
                Image img41 = new ImageIcon(this.getClass()
                        .getResource("/bin/41.png")).getImage();
                hidden.setIcon(new ImageIcon(img41));
                oTurn = 4;
                break;
            case 42:
                Image img42 = new ImageIcon(this.getClass()
                        .getResource("/bin/42.png")).getImage();
                hidden.setIcon(new ImageIcon(img42));
                oTurn = 4;
                break;
            case 43:
                Image img43 = new ImageIcon(this.getClass()
                        .getResource("/bin/43.png")).getImage();
                hidden.setIcon(new ImageIcon(img43));
                oTurn = 4;
                break;
            case 44:
                Image img44 = new ImageIcon(this.getClass()
                        .getResource("/bin/44.png")).getImage();
                hidden.setIcon(new ImageIcon(img44));
                oTurn = 4;
                break;
            case 45:
                Image img45 = new ImageIcon(this.getClass()
                        .getResource("/bin/45.png")).getImage();
                hidden.setIcon(new ImageIcon(img45));
                oTurn = 3;
                break;
            case 46:
                Image img46 = new ImageIcon(this.getClass()
                        .getResource("/bin/46.png")).getImage();
                hidden.setIcon(new ImageIcon(img46));
                oTurn = 3;
                break;
            case 47:
                Image img47 = new ImageIcon(this.getClass()
                        .getResource("/bin/47.png")).getImage();
                hidden.setIcon(new ImageIcon(img47));
                oTurn = 3;
                break;
            case 48:
                Image img48 = new ImageIcon(this.getClass()
                        .getResource("/bin/48.png")).getImage();
                hidden.setIcon(new ImageIcon(img48));
                oTurn = 3;
                break;
            case 49:
                Image img49 = new ImageIcon(this.getClass()
                        .getResource("/bin/49.png")).getImage();
                hidden.setIcon(new ImageIcon(img49));
                oTurn = 2;
                break;
            case 50:
                Image img50 = new ImageIcon(this.getClass()
                        .getResource("/bin/50.png")).getImage();
                hidden.setIcon(new ImageIcon(img50));
                oTurn = 2;
                break;
            case 51:
                Image img51 = new ImageIcon(this.getClass()
                        .getResource("/bin/51.png")).getImage();
                hidden.setIcon(new ImageIcon(img51));
                oTurn = 2;
                break;
            case 52:
                Image img52 = new ImageIcon(this.getClass()
                        .getResource("/bin/52.png")).getImage();
                hidden.setIcon(new ImageIcon(img52));
                oTurn = 2;
                break;
            default:
            }
        }

        }
    });
    btnNewButton.setBounds(171, 227, 89, 23);
    frame.getContentPane().add(btnNewButton);




}

} }

Answer 1

From your code, I am guessing you have a hidden instance variable declared and in your switch statement, you are adding icon to this JLabel.

But in your if condition, you are not using this hidden variable, but creating a new one.

Fix: Inside your for loop, search for all JLabel hidden strings and replace it just with hidden and see if your problem is solved.

Answer 2

I'm not sure when you want your cards to flip, but if it were me, I'd do things entirely different, and would try to do things in more of an OOP-kind of way. For one, I'd create a Card object, one that is composed of a suit and a rank fields, both of which are enums:

public enum Suit {
   CLUBS, DIAMONDS, HEARTS, SPADES
}

public enum Rank {
   ACE(1), TWO(2), THREE(3), FOUR(4), FIVE(5), SIX(6), SEVEN(7), EIGHT(8), NINE(
         9), TEN(10), JACK(11), QUEEN(12), KING(13);
   private int value;

   private Rank(int value) {
      this.value = value;
   }

   public int getValue() {
      return value;
   }
}

The Card.java class would have an equals and hashCode method so that I could use it in a HashMap and thereby associate an ImageIcon with each card.

public class Card {
   private Suit suit;
   private Rank rank;

   public Card(Suit suit, Rank rank) {
      this.suit = suit;
      this.rank = rank;
   }

   public Suit getSuit() {
      return suit;
   }

   public Rank getRank() {
      return rank;
   }

   @Override
   public String toString() {
      return "Card [suit=" + suit + ", rank=" + rank + "]";
   }

   @Override
   public int hashCode() {
      final int prime = 31;
      int result = 1;
      result = prime * result + ((rank == null) ? 0 : rank.hashCode());
      result = prime * result + ((suit == null) ? 0 : suit.hashCode());
      return result;
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj)
         return true;
      if (obj == null)
         return false;
      if (getClass() != obj.getClass())
         return false;
      Card other = (Card) obj;
      if (rank != other.rank)
         return false;
      if (suit != other.suit)
         return false;
      return true;
   }

}

I'd create a Deck.java class that would hold and shuffle all 52 cards, could be regenerated and could deal Cards:

public class Deck {
   private List<Card> cards = new ArrayList<>();

   public Deck() {
      regenerate();
   }

   public void regenerate() {
      cards.clear();
      for (Suit suit : Suit.values()) {
         for (Rank rank : Rank.values()) {
            cards.add(new Card(suit, rank));
         }
      }
      Collections.shuffle(cards);
   }

   public Card deal() {
      if (cards.size() > 0) {
         return cards.remove(0);
      } else {
         // or throw exception
         return null;
      }
   }
}

Then I'd create a method that would allow me to get my Card images (I have used a publicly available sprite sheet for this) and assign the appropriate icon to the appropriate card in the HashMap:

   public static Map<Card, Icon> createCardIconMap(String pathToDeck)
         throws IOException {
      BufferedImage fullDeckImg = ImageIO.read(new URL(pathToDeck));
      int width = fullDeckImg.getWidth();
      int height = fullDeckImg.getHeight();
      Map<Card, Icon> cardIconMap = new HashMap<>();
      for (int suitInt = 0; suitInt < Suit.values().length; suitInt++) {
         for (int rankInt = 0; rankInt < Rank.values().length; rankInt++) {
            int x = (rankInt * width) / Rank.values().length;
            int y = (suitInt * height) / Suit.values().length;
            int w = width / Rank.values().length;
            int h = height / Suit.values().length;
            BufferedImage cardImg = fullDeckImg.getSubimage(x, y, w, h);

            Suit suit = Suit.values()[suitInt];
            Rank rank = Rank.values()[rankInt];
            cardIconMap.put(new Card(suit, rank), new ImageIcon(cardImg));
         }
      }
      return cardIconMap;
   }

I would then create a GUI with which to manipulate the cards. If I wanted to flip cards with a mouse press, I'd add a MouseListener to my JLabels that hold the card image icons. e.g.,

private class LabelListener extends MouseAdapter {
  @Override
  public void mousePressed(MouseEvent e) {
     // get the pressed JLabel 
     JLabel label = (JLabel) e.getSource();

     // find out where it is in our array of JLabel
     int index = -1;
     for (int i = 0; i < labels.length; i++) {
        if (labels[i] == label) {
           // here it is!
           index = i;  
           break;
        }
     }
     if (index < 0) {
        // if index not found, get out of here
        return;
     }

     // get the label's current icon
     Icon icon = label.getIcon();
     if (icon == null) {
        // if it has none, get out of here!
        return;
     } else if (icon == cardBackIcon) {
        // if the icon is the card-back
        // then get the corresponding Card from our "model"
        // here simply an array of Card called dealtCards
        Card card = dealtCards[index];
        if (card == null) {
           // if array has nulls, get out of here!
           return;
        }
        // else set the current label's icon to 
        // the icon represented by the current card
        label.setIcon(cardIconMap.get(card));
     } else {
        // else a card is already showing, so let's show
        // a card-back instead
        label.setIcon(cardBackIcon);
     }
  }
}

The running program could look like so:

And the whole code could look something like so (please feel free to compile and run the program below to see what I mean):

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.imageio.ImageIO;
import javax.swing.*;

public class CardProg {
   public static final String CARD_IMAGES = "http://www.jfitz.com/cards/classic-playing-cards.png";
   public static final String CARD_BACK_IMG = "http://www.jfitz.com/cards/b1fv.png";

   private static void createAndShowGui() {
      Map<Card, Icon> cardIconMap = null;
      Icon cardBackIcon = null;
      try {
         cardIconMap = CreateCardFaces.createCardIconMap(CARD_IMAGES);
         cardBackIcon = new ImageIcon(ImageIO.read(new URL(CARD_BACK_IMG)));
      } catch (IOException e) {
         e.printStackTrace();
         System.exit(-1);
      }
      TablePanel mainPanel = new TablePanel(cardBackIcon, cardIconMap);

      JFrame frame = new JFrame("CardProg");
      frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
      frame.getContentPane().add(mainPanel);
      frame.setResizable(false);
      frame.pack();
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }

}

@SuppressWarnings("serial")
class TablePanel extends JPanel {
   private static final int PREF_W = 600;
   private static final int PREF_H = 400;
   private static final Color BASE_COLOR = new Color(0, 80, 0);
   private static final int ROWS = 2;
   private static final int COLS = 6;

   private Icon cardBackIcon;
   private Map<Card, Icon> cardIconMap;
   private JLabel[] labels = new JLabel[ROWS * COLS];
   private Card[] dealtCards = new Card[ROWS * COLS];
   private Deck deck = new Deck();

   public TablePanel(Icon cardBackIcon, Map<Card, Icon> cardIconMap) {
      this.cardBackIcon = cardBackIcon;
      this.cardIconMap = cardIconMap;

      JPanel centerPanel = new JPanel(new GridLayout(ROWS, COLS));
      centerPanel.setOpaque(false);
      for (int i = 0; i < labels.length; i++) {
         labels[i] = new JLabel();
         JPanel lPanel = new JPanel(new GridBagLayout());
         lPanel.setOpaque(false);
         lPanel.add(labels[i]);
         centerPanel.add(lPanel);

         labels[i].addMouseListener(new LabelListener());;
      }

      JButton dealButton = new JButton(new DealAction("Deal"));
      JPanel bottomPanel = new JPanel();
      bottomPanel.setOpaque(false);
      bottomPanel.add(dealButton);

      setBackground(BASE_COLOR);
      setLayout(new BorderLayout());
      add(centerPanel, BorderLayout.CENTER);
      add(bottomPanel, BorderLayout.PAGE_END);
   }

   @Override
   public Dimension getPreferredSize() {
      if (isPreferredSizeSet()) {
         return super.getPreferredSize();
      }
      return new Dimension(PREF_W, PREF_H);
   }

   private class LabelListener extends MouseAdapter {
      @Override
      public void mousePressed(MouseEvent e) {
         // get the pressed JLabel 
         JLabel label = (JLabel) e.getSource();

         // find out where it is in our array of JLabel
         int index = -1;
         for (int i = 0; i < labels.length; i++) {
            if (labels[i] == label) {
               // here it is!
               index = i;  
               break;
            }
         }
         if (index < 0) {
            // if index not found, get out of here
            return;
         }

         // get the label's current icon
         Icon icon = label.getIcon();
         if (icon == null) {
            // if it has none, get out of here!
            return;
         } else if (icon == cardBackIcon) {
            // if the icon is the card-back
            // then get the corresponding Card from our "model"
            // here simply an array of Card called dealtCards
            Card card = dealtCards[index];
            if (card == null) {
               // if array has nulls, get out of here!
               return;
            }
            // else set the current label's icon to 
            // the icon represented by the current card
            label.setIcon(cardIconMap.get(card));
         } else {
            // else a card is already showing, so let's show
            // a card-back instead
            label.setIcon(cardBackIcon);
         }
      }
   }

   private class DealAction extends AbstractAction {
      public DealAction(String name) {
         super(name);
         int mnemonic = (int) name.charAt(0);
      }

      @Override
      public void actionPerformed(ActionEvent e) {
         deck.regenerate();
         for (int i = 0; i < dealtCards.length; i++) {
            dealtCards[i] = deck.deal();
            labels[i].setIcon(cardBackIcon);
         }
      }
   }

}

class Deck {
   private List<Card> cards = new ArrayList<>();

   public Deck() {
      regenerate();
   }

   public void regenerate() {
      cards.clear();
      for (Suit suit : Suit.values()) {
         for (Rank rank : Rank.values()) {
            cards.add(new Card(suit, rank));
         }
      }
      Collections.shuffle(cards);
   }

   public Card deal() {
      if (cards.size() > 0) {
         return cards.remove(0);
      } else {
         // or throw exception
         return null;
      }
   }
}

enum Suit {
   CLUBS, DIAMONDS, HEARTS, SPADES
}

enum Rank {
   ACE(1), TWO(2), THREE(3), FOUR(4), FIVE(5), SIX(6), SEVEN(7), EIGHT(8), NINE(
         9), TEN(10), JACK(11), QUEEN(12), KING(13);
   private int value;

   private Rank(int value) {
      this.value = value;
   }

   public int getValue() {
      return value;
   }
}

class Card {
   private Suit suit;
   private Rank rank;

   public Card(Suit suit, Rank rank) {
      this.suit = suit;
      this.rank = rank;
   }

   public Suit getSuit() {
      return suit;
   }

   public Rank getRank() {
      return rank;
   }

   @Override
   public String toString() {
      return "Card [suit=" + suit + ", rank=" + rank + "]";
   }

   @Override
   public int hashCode() {
      final int prime = 31;
      int result = 1;
      result = prime * result + ((rank == null) ? 0 : rank.hashCode());
      result = prime * result + ((suit == null) ? 0 : suit.hashCode());
      return result;
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj)
         return true;
      if (obj == null)
         return false;
      if (getClass() != obj.getClass())
         return false;
      Card other = (Card) obj;
      if (rank != other.rank)
         return false;
      if (suit != other.suit)
         return false;
      return true;
   }

}

class CreateCardFaces {
   // method only works with 
   // http://www.jfitz.com/cards/classic-playing-cards.png
   // sprite sheet
   public static Map<Card, Icon> createCardIconMap(String pathToDeck)
         throws IOException {
      BufferedImage fullDeckImg = ImageIO.read(new URL(pathToDeck));
      int width = fullDeckImg.getWidth();
      int height = fullDeckImg.getHeight();
      Map<Card, Icon> cardIconMap = new HashMap<>();

      // the sprite sheet that I'm using uses this order of suits: 
      Suit[] suitOrder = {Suit.CLUBS, Suit.SPADES, Suit.HEARTS, Suit.DIAMONDS};
      for (int suitInt = 0; suitInt < suitOrder.length; suitInt++) {
         for (int rankInt = 0; rankInt < Rank.values().length; rankInt++) {
            int x = (rankInt * width) / Rank.values().length;
            int y = (suitInt * height) / suitOrder.length;
            int w = width / Rank.values().length;
            int h = height / suitOrder.length;
            BufferedImage cardImg = fullDeckImg.getSubimage(x, y, w, h);

            Suit suit = suitOrder[suitInt];
            Rank rank = Rank.values()[rankInt];
            cardIconMap.put(new Card(suit, rank), new ImageIcon(cardImg));
         }
      }

      return cardIconMap;
   }
}