Write a method that checks whether the diagonal joining the upper$-$left and the lower$-$right corners of a tic$-$tac$-$toe board are all the same.

TicTacToeTester.java

public class TicTacToe

$\{$

$1****$

Return true if all elements on the diagonal joining the upper$-$left

and the lower$-$right corners all the same.

@param board a $33$ array of String

@return true if all elements are the same.

Your code goes here $*/$

$\}$

$\}$