Максимальный столбец

import java.util.Scanner;
import java.util.ArrayList;

public class untitled {
    public static void main (String[] args) {
        Scanner in = new Scanner(System.in);
        ArrayList<String> tmpAllM = new ArrayList<>();
        String symbol = in.nextLine();
        tmpAllM = numberLiter(symbol);
        int N = Integer.parseInt(tmpAllM.get(0));
        int M = Integer.parseInt(tmpAllM.get(1));
           int [][] masNM= new int[N][M];
        for(int i = 0; i < N; i++) {
            for (int j = 0; j < M; j++) {
                System.out.print("Введи циферку :");
                masNM[i][j] = in.nextInt();
            }
        }
        for(int i = 0; i < N; i++) {
            for (int j = 0; j < M; j++) {
                System.out.print(masNM[i][j]+ "\t");
            }
            System.out.println();
        }

        int maxSum = 0;
        String maxn = "";
        for (int j = 0; j < M; j++){
            int sum = 0;
            String n = "";
            boolean flag = false;
            for (int i = 0; i < N; i++) {
                sum = sum + masNM[i][j];
                n = n+ masNM[i][j] +" ";
                if(i == N-1){
                    flag = true;
                }
            }
            if (flag && sum>maxSum ){
                maxSum = sum;
                maxn = n;
                }
        }
        System.out.println(maxSum);
        System.out.print(maxn);
    }

    public static ArrayList<String> numberLiter (String str){
        ArrayList<String> tmpM = new ArrayList<>();
        for(String s: str.split(" ")){
            tmpM.add(s);
        }
        return tmpM;
    }

}