Diagonal Difference

package com.company;

import java.util.Arrays;
import java.util.Scanner;

/**
 * Created by DarkSoul on 30.7.2016 г..
 */
public class ThirteenDiagonalDifference {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        Integer numOfLines = scan.nextInt();
        scan.nextLine();

        int[][] matrix = new int[numOfLines][numOfLines];
        for (int i = 0; i < numOfLines; i++) {
            int[] row = Arrays.stream(
                    scan.nextLine().split(" "))
                    .mapToInt(Integer::parseInt).toArray();
            for (int rows = 0; rows <row.length; rows++) {
                    matrix[i][rows]=row[rows];

            }
        }
        SumDiagonals(matrix);

       // PrintingTheMatrix(matrix);


    }


//    public static void PrintingTheMatrix(int[][] matrix){
//        for (int rows = 0; rows <matrix.length ; rows++) {
//            for (int cols = 0; cols <matrix.length ; cols++) {
//                System.out.print(matrix[rows][cols]+" ");
//            }
//            System.out.println();
//        }
//    }

    public static void SumDiagonals(int[][] matrix){
        int sumOfPrimeDiag = 0;
        int sumOfSecondaryDiag = 0;
        for (int i = 0; i < matrix.length; i++) {
            sumOfPrimeDiag+=matrix[i][i];
            sumOfSecondaryDiag += (matrix[i][matrix[i].length - 1 - i]);
        }

        int diagDiff = Math.abs(sumOfPrimeDiag-sumOfSecondaryDiag);
        System.out.println(diagDiff);
    }

}