Add JPanel to JFrame ( Error ) Help please

/*
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 * and open the template in the editor.
 */
package team.rakkstar.application.form;

import javax.swing.JFrame; 
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
 *
 * @author RAZER08
 */


public class TeamRakkStarApplicationForm extends JFrame 
{
    public static void main (String[]args)
    {
        JPanel jp = new JPanel();
        JLabel jl = new JLabel();
        JTextField jt = new JTextField(30);
        
        JFrame a = new JFrame ("Team rakkStar Application Form");
        
        a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        a.setSize(800,600);
        a.setVisible(true);
        
        jp.add(jt);
        [color="#FF0000"]add(jp);[/color]
        
        
        
    }
}