I try to create a JTabbedPane object, but it does not work. What is wrong??
Mike

======Codelist.java========
import java.awt.*;
import javax.swing.*;

public class Codelist extends JPanel {
    public JTabbedPane Codelist(String var) {
        JTabbedPane pn = new JTabbedPane();
        JPanel p1 = new JPanel(new GridBagLayout());
            p1.add(new JButton(var));
            pn.addTab("tab1",p1);
        return pn;
    }
    public static void main(String[] args){
        final JFrame frame = new JFrame("test");
        frame.addWindowListener(new WindowAdapter()
            {public void windowClosing(WindowEvent e) {System.exit(0);}});
        JPanel p = new JPanel(new GridBagLayout());
      Codelist c = new Codelist("but1");
        p.add(c);
        frame.getContentPane().add(p);
        frame.pack();
        frame.show();
}
}