Tic Tac Toe Game - GUI Freezes When Someone Wins

This code is for a tic tac toe game. I have a action listener set up and if the user entered a move that would win the game of tic tac toe it would call on a restart() method to clear the board, but every time some one wins the GUI freezes.

class ListenerCA implements ActionListener {
public void actionPerformed(ActionEvent event) {
Board.clear();
if (turn == 0) {
start.answer = "CA";

[Code] .....

The code below this is the normal execution flow.

static void start_game(String board[][]){
final int one = 1;
final int two = 2;
int x = 0;
play game = new play();

[Code] .....

In the above code gui == true always, I just kept an option if i ever wanted to run the program in console. The code below is the restart method.

static void restartgui() {
gui = true;
if (gui ==true) {
board[0][0] = " ";
board[0][2] = " ";

[Code] ....