Bikeshop

package bibikes;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class Bike implements ActionListener {
    String[] bikeName = new String[]{   "B.O.N.E", "Colony", "DK", "Fit", "Ghost"   };

    Integer[] numberOfBike = new Integer[]{ 1, 2,3, 4, 5    };

    JComboBox comboxName = new JComboBox(bikeName);
    JComboBox comboxNumber = new JComboBox(numberOfBike);

    JLabel welcome = new JLabel("welcome to my bike magazine");

    JButton ok = new JButton("ok");

    JPanel panel = new JPanel();

    public void init(){
        GridLayout bl = new GridLayout(4,1);
        panel.setLayout(bl);
        panel.add(welcome);
        panel.add(comboxName);
        panel.add(comboxNumber);
        panel.add(ok);

        JFrame frame = new JFrame("Bike shop");
        frame.setContentPane(panel);

        frame.pack();

        frame.setVisible(true);

        ok.addActionListener(this);
    }

    public void actionPerformed(ActionEvent e) {
        String BN = (String) comboxName.getSelectedItem();
        Integer NB = (Integer) comboxNumber.getSelectedItem();
        JOptionPane.showConfirmDialog(null,
                "you chose " + BN+" "+ NB + " pieces",
                null, JOptionPane.PLAIN_MESSAGE);

    }



    public static void main(String[] args) {
        Bike b = new Bike();
        b.init();

    }

}