Java JFrame and JButton Help

ive been trying to get underway on this program for my java class but i cant even get the first two elements to appear.  anyone know why my JFrame is blank? 
 
edit: it looks like in the copy and past from Jgrasp the code got a little funky looking so be gentle.
 
 
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 

public class TenNumbers
{  
   
public static void main(String [] args)
{
ManyNumbers mn = new ManyNumbers("To be Named Later - Program 6");
      
   }
}
 
class ManyNumbers extends JFrame
{
public static final int MAX_NUM = 10;
 
JTextField [] nums = new JTextField[MAX_NUM];
JButton newNums = new JButton("New Numbers");
   JTextField text1 = new JTextField();
  
  
public ManyNumbers(String s)
{
      
super(s);
setLayout(new FlowLayout());
      pack();
setVisible(true);
     ;
      
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
 
 
}