My image if a $3$x$3$ tictactoe board is showing up$,$ but when i press on a square, an o nor x is showing. But if i press the buttons as if im playing the game still, it eventually says that x win, o wins, or that its a tie. What is wrong with this code that its not show the images of my x$\text{'}$s and o$\text{'}$s$?$

package games.boards;

import java.awt.event.ActionEvent;

import javax.swing.SwingUtilities;

import javax.swing.JFrame;

import javax.swing.JOptionPane;

import games.boards.Cell;

import java.awt.event.ActionListener;

public class TicTacToeGame extends JFrame $\{$

private Board gb;

private int turn;

private int$[][]$gameboard;

static final int EMPTY $=0$;

static final int NOUGHT $=-1$;

static final int CROSS $=1$;

public static void main$($String$[]$ args$)\{$

SwingUtilities.invokeLater$($new Runnable$()$

$\{$

public void run$()\{$

new TicTacToeGame$(3,3)$;

$\}$

$\})$;

$\}$

public TicTacToeGame$($int rows, int cols$)\{$

gb $=$ new Board$($rows$,$ cols, new ActionListener$()\{$

public void actionPerformed$($ActionEvent e$)\{$

Cell c $=($Cell$)$ e$.$getSource$()$;

takeTurn$($c$)$;

$\}$

$\})$;

gameboard $=$ new int$[$rows$][$cols$]$;

turn $=0$;

this.add$($gb$)$;

this.setDefaultCloseOperation$($EXIT$\_$ON$\_$CLOSE$)$;

this.setTitle$("$TIC$-$TAC$-$TOE"$)$;

this.setSize$(300,300)$;

this.setVisible$($true$)$;

$\}$

public void set$($int val, int row, int col$)$ throws IllegalArgumentException$\{$

if $($gameboard$[$row$][$col$]==$ EMPTY$)$

gameboard$[$row$][$col$]=$ val;

else

throw new IllegalArgumentException $("$player already there"$)$;

$\}$

public int getOutcome$()\{$

for $($int i $=0$; i $<3$; i$++)\{$

if $(($gameboard$[$i$][0]+$ gameboard$[$i$][1]+$ gameboard$[$i$][2]==3*$ NOUGHT$)||$

$($gameboard$[0][$i$]+$ gameboard$[1][$i$]+$ gameboard$[2][$i$]==3*$ NOUGHT$))\{$

return NOUGHT;

$\}$ else if $(($gameboard$[$i$][0]+$ gameboard$[$i$][1]+$ gameboard$[$i$][2]==3*$ CROSS$)||$

$($gameboard$[0][$i$]+$ gameboard$[1][$i$]+$ gameboard$[2][$i$]==3*$ CROSS$))\{$

return CROSS;

$\}$

$\}$

$//$ Check diagonals

if $(($gameboard$[0][0]+$ gameboard$[1][1]+$ gameboard$[2][2]==3*$ NOUGHT$)||$

$($gameboard$[0][2]+$ gameboard$[1][1]+$ gameboard$[2][0]==3*$ NOUGHT$))\{$

return NOUGHT;

$\}$ else if $(($gameboard$[0][0]+$ gameboard$[1][1]+$ gameboard$[2][2]==3*$ CROSS$)||$

$($gameboard$[0][2]+$ gameboard$[1][1]+$ gameboard$[2][0]==3*$ CROSS$))\{$

return CROSS;

$\}$

$//$ Check tie

boolean TIE $=$ true;

for $($int$[]$row : gameboard$)\{$

for $($int cell : row$)\{$

if $($cell $==$ EMPTY $)\{$

TIE $=$ false;

break;

$\}$

$\}$

$\}$

if$($TIE$)\{$

return $0$;

$\}$

return $-2$;

$\}$

protected void takeTurn$($Cell c$)\{$

int curMark $=($turn$++\%2==0)?$ NOUGHT :

CROSS;

set$($curMark$,$c$.$getRow$(),$ c$.$getColumn$())$;

int outcome $=$ getOutcome$()$;

if $($outcome $==-1)\{$

JOptionPane.showMessageDialog$($this$,"0\text{'}$s win"$)$;

$\}$

else if $($outcome $==1)\{$

JOptionPane.showMessageDialog$($this$,"$X$\text{'}$s win"$)$;

$\}$

else if $($outcome $==0)\{$

JOptionPane.showMessageDialog$($this$,$ "TIE" $)$;

System.exit$(0)$;

$\}$

$\}$

$\}$