JTabbedPane + JComboBox + JImg

import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.*;
import javax.swing.event.*;

public class Main {
    JTabbedPane jtp;
    JPanel jp;
    JFrame jf;

    Main() {
        jtp = new JTabbedPane();
        jtp.add("FY", new FY());
        jtp.add("SY", new SY());

        jp = new JPanel();
        jp.setLayout(new FlowLayout());
        jp.add(jtp);

        jf = new JFrame();
        jf.getContentPane().add(jp);
        jf.pack();
        jf.setVisible(true);
    }

    public static void main(String[] args) {
        new Main();
    }

}

class FY extends JPanel implements ItemListener{
    JComboBox<String> jcb;
    JLabel jl;
    JOptionPane jopt;

    FY(){
        jopt = new JOptionPane();
        jl = new JLabel("Courses: ");
        jcb = new JComboBox<String>();
        jcb.addItem("BSc-IT");
        jcb.addItem("BMM");
        jcb.addItem("BMS");
        add(jl);
        add(jcb);
        jcb.addItemListener(this);
    }

    @Override
    public void itemStateChanged(ItemEvent e) {
        if( e.getStateChange() == 1 ) {
            String s = e.getItem().toString();
            System.out.println(s);
            jopt.showMessageDialog(null, "You selected " + s);
        }
    }
}

class SY extends JPanel{
    JLabel jl;
    ImageIcon img;
    SY(){
        img = new ImageIcon("C:\\Users\\Hp\\Pictures\\cartoon.png");
        jl = new JLabel();
        jl.setIcon(img);
        add(jl);
    }
}