Creating GUI Game Of Life??

This is my code for the game of life GUI. I have created the GUI and the window pops up, however I don't understand how to get the Game of Life game to display within this window?

can somebody provide some help please?

import java.io.*;
import javax.swing.JFrame;
import java.awt.Color;
import java.awt.FlowLayout; //Provides default layout managing
import javax.swing.JLabel;

public class LifeMain extends JFrame
{
private static JLabel label; //Creates a new label

public LifeMain()
{
super("Game Of Life");
setLayout(new FlowLayout());
label = new JLabel("Conway's Game Of Life");
label.setToolTipText("LIFE");
label.setOpaque(true);
label.setForeground(Color.BLUE);
label.setVisible(true);
add(label);

}

public static void main(String[] args) throws FileNotFoundException, InterruptedException
{
LifeMain lm = new LifeMain(); //Constructor calling the GUI class
lm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
lm.setSize(800,600);
lm.setAlwaysOnTop(true);
lm.setVisible(true);
lm.setBackground(Color.BLACK);

LifeGrid lg = new LifeGrid(9,9,"seed.txt"); //Creates an instance of LifeGrid called lg and fills the parameter
lg.show(); //Calls the show method

System.out.println(lg.toString()); //Prints the Height and Width from LifeGrid class
System.out.println("Grid Contents = " + lg.getContents(8,5) + "\nNeighbours = " + lg.Neighbours(2,2)); //x,y

int x = 1; //Initialize variable x
while(x<100) //Unless x goes above 100 do the following
{
x++; //Increments x by 1
System.out.println("\nNextGen = " + x); //Prints to screen x (Number of generation)
lg.Run(); //Calls the run method to run
Thread.sleep(1000); //Waits 1 second before executing next command
}

}
}