Convert to windowed application-JFrame

Question

I need to convert this program into a windowed application of the subclass JFrame and use Graphics method drawString to output the totals. I know I need to import java awt.* and java. awt.event.* but other than that I need help. Thanks.
// Roll a six-sided die 6000 times
import javax.swing.*;
public class RollDie {
   public static void main( String args[] )
      int face, frequency[] = new int[ 7 ];
      String output = "";
      for ( int roll = 1; roll <= 6000; roll++ ) {
         face = 1 + ( int ) ( Math.random() * 6 );
         ++frequency[ face ];
      output += "Face\tFrequency"
      for ( face = 1; face < frequency.length; face++ )
         output += "\n" + face + "\t" + frequency[ face ];
      JTextArea outputArea = new JTextArea( 7, 10 );
      outputArea.setText( output );
      JOptionPane.showMessageDialog( null, outputArea,
         "Rolling a Die 6000 Times",
         JOptionPane.INFORMATION_MESSAGE );
      System.exit( 0 );
}

Answer 1

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class RollDie extends JFrame {
     JFrame frame;
     public RollDie(){
          frame = new JFrame();
          frame.setVisible(true);
          frame.setSize(400,400);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          Container contentpane = frame.getContentPane();
          int face, frequency[] = new int[ 7 ]; 
          String output = "";     
          for ( int roll = 1; roll <= 6000; roll++ ) {
               face = 1 + ( int ) ( Math.random() * 6 );       
             ++frequency[ face ];   
             output += "Face\tFrequency";     
             for ( face = 1; face < frequency.length; face++ )
             output += "\n" + face + "\t" + frequency[ face ];   
             JTextArea outputArea = new JTextArea( 7, 10 );   
             outputArea.setText( output );    
             contentpane.add(outputArea);
             JOptionPane.showMessageDialog( null, outputArea,         "Rolling a Die 6000 Times",         JOptionPane.INFORMATION_MESSAGE );   
             System.exit( 0 ); 
            public static void main( String args[] )   { 
            RollDie rd = new RollDie();
}