Magic Square

import java.util.*;

public class Assignment2 {
   static ArrayList<Integer> arr= new ArrayList<>(5);

    public static void row_sum(int array[][],int row,int column){
        int i,j,sum_row;

        for(i=0;i<row;i++){
            sum_row = 0;
            for(j=0;j<column;j++){
                sum_row = sum_row +array[i][j];
            }
            arr.add(sum_row);
        }
    }

    public static void column_sum(int array[][],int row,int column){
        int i,j,sum_column;

        for(j=0;j<column;j++){
            sum_column = 0;
            for(i=0;i<row;i++){
                sum_column = sum_column +array[i][j];
            }
            arr.add(sum_column);
        }
    }

    public static void diagonal_sum(int array[][],int row,int column){
        int i,j,sum_maindiag,sum_second_diag;

        sum_maindiag = 0;
        for (i = 0; i < row; i++) {
            for (j = 0; j < column; j++) {
                if(i==j){
                    sum_maindiag = sum_maindiag+array[i][j];
                }
            }
        }
        arr.add(sum_maindiag);

        sum_second_diag = 0 ;
        j = column-1;
        for (i = 0;i < row; i++) {
            sum_second_diag += array[i][j];
            j--;
        }
        arr.add(sum_second_diag);
    }

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

    int row,column,i,j,magic_number;

    System.out.print("Please enter the desire grid dimension: ");

    row = sc.nextInt();
    column = sc.nextInt();

    int array[][] = new int[row][column];

    magic_number = (int) ((row*(Math.pow(row,2) + 1))/2);
    System.out.println("Please enter the desired input:");

    for(i=0;i<row;i++){
        for(j=0;j<column;j++){
             array[i][j] = sc.nextInt();
        }
    }

    System.out.println();
    row_sum(array,row,column);
    column_sum(array,row,column);
    diagonal_sum(array,row,column);

boolean flag = true;
for(i=1;i<arr.size();i++){
    if(arr.get(0).equals(arr.get(i))){
            flag = true;
    }
    else{
        flag = false;
        break;
    }
}

if(flag){
    System.out.println("This is a LO Shu Magic Square.");
    System.out.println("And,the magic number is " + magic_number + ".");
    System.out.println("Thank you!!!");
}
else{
    System.out.println("This is not a LO Shu Magic Square.");
    System.out.println("Thank you!!!");
}
    }
}