Wave Print Column Wise [codingblocks]

 Take as input a two-d array. Wave print it column-wise.

Input Format
Two integers M(row) and N(colomn) and further M * N integers(2-d array numbers).

Constraints
Both M and N are between 1 to 10.

Output Format
All M * N integers seperated by commas with 'END' wriiten in the end(as shown in example).

Sample Input
4 4
11 12 13 14
21 22 23 24
31 32 33 34
41 42 43 44

Sample Output
11, 21, 31, 41, 42, 32, 22, 12, 13, 23, 33, 43, 44, 34, 24, 14, END

Java Code:

IDE Code: https://ide.geeksforgeeks.org/FKyP9Y8thu

/*
Amit Kumar
04-12-2020
IDE Code: https://ide.geeksforgeeks.org/FKyP9Y8thu
*/

package array;
import java.util.Scanner;

public class Array_WavePrintColomnWise {
    public static Scanner scanner = new Scanner(System.in);
    public static void main(String [] args) {
        int row = scanner.nextInt();
        int col = scanner.nextInt();
        int [][] twoDarray = new int[row][col];

        for (int i=0; i<row; i++) {
            for (int j=0; j<col; j++) {
                twoDarray[i][j] = scanner.nextInt();
            }
        }

        wavePrintColomnWise(twoDarray, row, col);
    }

    private static void wavePrintColomnWise(int[][] twoDarray, int ROW, int COL) {
        for (int i=0; i<COL; i++) {
            for (int j=0; j<ROW; j++) {
                if (i % 2 == 0) {
                    System.out.print(twoDarray[j][i] + ", ");
                } else {
                    System.out.print(twoDarray[ROW-1-j][i] + ", ");
                }
            }
        }
        System.out.println("END");
    }
}