Slot Machine Randomise

I am creating a slot machine project(for fun).I am displaying the fruits in a JTextField. I have managed to display random fruits in the JTextFields, but the random fruits are the same, for example, the result would be -> Orange, Orange, Orange. Or it would be, Kiwi, Kiwi, Kiwi. ETC. Here is my code.

    import java.awt.BorderLayout;...

    import java.util.Random;


    public class Game extends JFrame {

    String [] fruits = { "Cherry", "Lemon", "Orange", "Grape", "Kiwi" };

    String fruit = fruits[(int) (Math.random() * fruits.length)];

    private JPanel contentPane;
    private JTextField Slot_1;
    private JTextField Slot_2;
    private JTextField Slot_3;

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

    /**
    * Create the frame.
    */
    public Game() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 450, 300);
    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    contentPane.setLayout(null);

    Slot_1 = new JTextField();
    Slot_1.setText("----------------");
    Slot_1.setEditable(false);
    Slot_1.setBounds(41, 53, 95, 28);
    contentPane.add(Slot_1);
    Slot_1.setColumns(10);

    Slot_2 = new JTextField();
    Slot_2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

        }
    });
    Slot_2.setText("-----------------");
    Slot_2.setEditable(false);
    Slot_2.setColumns(10);
    Slot_2.setBounds(183, 53, 95, 28);
    contentPane.add(Slot_2);

    Slot_3 = new JTextField();
    Slot_3.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

        }
    });
    Slot_3.setText("---------------");
    Slot_3.setEditable(false);
    Slot_3.setColumns(10);
    Slot_3.setBounds(317, 53, 95, 28);
    contentPane.add(Slot_3);

    JButton btn_Pull = new JButton("Pull");
    btn_Pull.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

            Slot_1.setText(fruit);
            Slot_2.setText(fruit);
            Slot_3.setText(fruit);

        }
    });
    btn_Pull.setBounds(145, 108, 166, 29);
    contentPane.add(btn_Pull);

    JButton btnMenu = new JButton("Menu");
    btnMenu.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

        }
    });

    btnMenu.setBounds(383, 243, 61, 29);
    contentPane.add(btnMenu);




}
}

Thank you