Declare a two$-$dimensional array for representing a tic$-$tac$-$toe board like this:

$+---+---+---+$

$|$ x $|$ o $|$ x $|$

$+---+---+---+$

$|$ o $|$ o $||$

$+---+---+---+$

$||$ x $||$

$+---+---+---+$

The board has three rows and columns and contains strings $"$x$","$o$",$ and $"".$ The Util.print method will add the borders when printing.