private void notifyGameOver(){
		List<Player> winners = game.getWinner();
		StringBuffer sb = new StringBuffer();
		sb.append("Game over! ");
		sb.append(winners.size()>1? "The winners are " : "The winner is ");
		for(Player p : winners){
			sb.append(p.getName()+" ");
		}
        JOptionPane.showMessageDialog(null, sb.toString(), "Game Over!", JOptionPane.INFORMATION_MESSAGE);

		for(Map.Entry<Player, GameFrame> e : allGameFrames.entrySet()){
			 GameFrame frame = e.getValue();
			 frame.setVisible(false);
			 frame.dispose();
		}
		showMenu();
	}