JLabel not showing in JFrame

Question

Here is my code, I thought I was doing this right but can't get this to show up
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
* @author  Administrator
public class EditFrame extends JFrame{
    LP editing_lp;
    JPanel editing_panel, top, center, bottom;
    JButton edit;
    JTextField Band, Album, Price, Comment;
    JLabel serial, band, album, price, comment;
    /** Creates a new instance of EditFrame */
    public EditFrame() {
        super();
        setTitle("Edit the information of an LP");
        setSize(500,300);
        addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                setVisible(false);}
        Container cp=getContentPane();
        //editing_lp = in_lp;
        this.setVisible(true);
        this.createPanel();
        cp.add(editing_panel);
    public void createPanel(){
        //Build the main panel
        editing_panel = new JPanel();       
        editing_panel.setLayout(new BorderLayout());
        //Build the top panel
        top = new JPanel();
        top.setLayout(new GridLayout(1,1));       
        serial = new JLabel("The LP serial number: ");
        top.add(serial);
        //Adding the minor panels to the major panel
        editing_panel.add(BorderLayout.NORTH, top);
    public static void main(String[] args){
        EditFrame my_ef = new EditFrame();
}If you guys can give me any help that would be much appreciated.

Answer 1

see the only change i made
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
* @author  Administrator
public class EditFrame extends JFrame{
//    LP editing_lp;
    JPanel editing_panel, top, center, bottom;
    JButton edit;
    JTextField Band, Album, Price, Comment;
    JLabel serial, band, album, price, comment;
    /** Creates a new instance of EditFrame */
    public EditFrame() {
        super();
        setTitle("Edit the information of an LP");
        setSize(500,300);
        addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                setVisible(false);}
        Container cp=getContentPane();
        //editing_lp = in_lp;
        this.createPanel();
        /*********** First add the panel and then set to true **********/
        cp.add(editing_panel);
        this.setVisible(true);
    public void createPanel(){
        //Build the main panel
        editing_panel = new JPanel();
        editing_panel.setLayout(new BorderLayout());
        //Build the top panel
        top = new JPanel();
        top.setLayout(new GridLayout(1,1));
        serial = new JLabel("The LP serial number: ");
//        serial.setVisible(true);
        top.add(serial);
        //Adding the minor panels to the major panel
        editing_panel.add(BorderLayout.NORTH, top);
    public static void main(String[] args){
        EditFrame my_ef = new EditFrame();
}