Write a program that reads a $2$D array $($matrix$)$ of dimensions m x m from standard input. The elements should be read row by row.

private static int$[][]$ readMatrix$($int rows, int columns, BufferedReader reader$)$ throws IOException $\{$

int$[][]$ matrix $=$ new int$[$rows$][$columns$]$;

$//$ Logic to read the matrix row by row

$//$ code should go here

return matrix;

$\}$