Задача за сумиране

package com.company;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int rows = scan.nextInt();
        int cols = scan.nextInt();


        int numbers[][] = new int[rows][cols];


        for (int r = 0; r < numbers.length; r++) {
            for (int c = 0; c < numbers[r].length; c++) {


                System.out.println(" [ " + r + " ] [ " + c + " ] : ");
                numbers[r][c] = scan.nextInt();
            }
        }
        Print(numbers);
        Sum(numbers);
    }

    public static void Print(int numbers[][]) {
        for (int i = 0; i < numbers.length; i++) {
            for (int j = 0; j < numbers.length; j++) {
                System.out.print(numbers[i][j] + " ");

            }
            System.out.println();
        }
    }
    public static void Sum(int numbers [][]){

        int sum = 0;
        for (int i = 0; i < numbers.length; i++) {
            for (int j = 0; j < numbers.length; j++) {
                sum += numbers[i][j];
            }
        }
        System.out.print("Sum is :" + sum);
    }
}