Java2dArray.java

// https://www.hackerrank.com/challenges/java-2d-array/problem

import java.util.Scanner;

public class Java2dArray {
 public static void main(String[] args) {
 int[][] matrix = getInput();
 System.out.println(maxHourGlassSum(matrix));
 }

 private static int maxHourGlassSum(int[][] matrix) {
 int sum = Integer.MIN_VALUE;
 for (int row = 0 ; row < 4 ; row++) {
 for (int column = 0 ; column < 4 ; column++) {
 sum = Math.max(sum, hourGlassSum(row, column, matrix));
 }
 }
 return sum;
 }

 private static int hourGlassSum(int row, int column, int[][] matrix) {
 int sum = 0;
 for (int index = 0 ; index < 3 ; sum += matrix[row][column + index++]);
 for (int index = 0 ; index < 3 ; sum += matrix[row + 2][column + index++]);
 return sum + matrix[row + 1][column + 1];
 }

 private static int[][] getInput() {
 Scanner scanner = new Scanner(System.in);
 int[][] matrix = new int[6][6];
 for (int row = 0 ; row < 6 ; row++) {
 for (int column = 0 ; column < 6 ; column++) {
 matrix[row][column] = scanner.nextInt();
 }
 }
 scanner.close();
 return matrix;
 }
}