Java: Sum elements column by column

package chapter8_8_1;
import java.util.Scanner;
/**
 *
 * @author Siavash Bakhshi
 */
public class Chapter8_8_1 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        double[][] m = createArray(); // Get an array
        double sum = 0.0;
        // Create a Scanner
        Scanner input = new Scanner(System.in);
        for (int column = 0; column < m[0].length; column++){
            sum = sumColumn(m, column);
            System.out.println("Sum of the elements at column " + (column+1) + " is " + sum);
        }
    }
 

    public static double[][] createArray(){
        Scanner input = new Scanner(System.in);
        double[][] m = new double[3][4];
        System.out.println("Enter a " + m.length + "-by-" + m[0].length + " matrix row by row: ");
        for (int i = 0; i < m.length; i++){
            for (int j = 0; j < m[0].length; j++){
                m[i][j] = input.nextDouble();
            }
        }//input.close();
        return m;
    }
    

    public static double sumColumn(double[][] m, int columnIndex) {
        double total = 0.0;
        for (int row = 0; row < m.length; row++) {
            total += m[row][columnIndex];
        }
    return total;
    }
}