Sum Non-Boundary Elements

import java.util.*;
public class SumNonBoundaryElements
{
    public static void main(String args[])
    {
        int row=0,col=0,sum=0;
        Scanner sc=new Scanner(System.in);
        System.out.print("Enter no.of rows: ");
        row=sc.nextInt();
        System.out.print("Enter no.of columns: ");
        col=sc.nextInt();
        int ar[][]=new int[row][col];
        System.out.println("Enter matrix elements:-");
        for(int i=0;i<row;i++)
        {
            for(int j=0;j<col;j++)
            {
                ar[i][j]=sc.nextInt();
            }
        }
        System.out.print("Boundary elements are: ");
        for(int i=1;i<row-1;i++)
        {
            for(int j=1;j<col-1;j++)
            {
                sum=sum+ar[i][j];
            }
        }
        System.out.println("Sum of non-boundary elements is "+sum);
    }
}