public void changeCase(boolean upper)
	{
		for (int x = 0; x < grid.length; x++)
		{
			for (int y = 0; y < grid[x].length; y++)
			{
				String c = String.valueOf(grid[x][y]);
				c = upper ? c.toUpperCase() : c.toLowerCase();
				grid[x][y] = c.charAt(0);
			}
		}
	}