Fill the Matrix

package MultidimensionalArrays2;

import java.util.Scanner;

public class FillTheMatrix {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String[] line = scanner.nextLine().split(", ");
        int matSize = Integer.parseInt(line[0]);
        char pattern = line[1].charAt(0);
        int num = 1;
        int row;
        int col;

        int[][] matrix = new int[matSize][matSize];

        switch (pattern) {
            case 'A':
                for (col = 0; col < matSize; col++) {
                    for (row = 0; row < matSize; row++) {
                        matrix[row][col] = num;
                        num++;
                    }
                }
                PrintMatrix(matrix);
                break;
            case 'B':
                for (col = 0; col < matSize; col++) {
                    if (col % 2 == 0) {
                        for (row = 0; row < matSize; row++) {
                            matrix[row][col] = num;
                            num++;
                        }
                    } else {
                        for (row = matSize - 1; row >= 0; row--) {
                            matrix[row][col] = num;
                            num++;
                        }
                    }
                }
                PrintMatrix(matrix);
                break;
        }
    }

    private static void PrintMatrix(int[][] matrix) {
        for (int row = 0; row < matrix.length; row++) {
            for (int col = 0; col < matrix[0].length; col++) {
                System.out.print(matrix[row][col] + " ");
            }
            System.out.println();
        }
    }
}