Java Program to accept integer numbers using Scanner Loop and find the sum of them

The following Code is to explain the use of #hasNetInt() of 'Scanner' Class in java.util package. It's an boolean method use to check the input is an 'Integer' value or not.
Code:-

import java.util.*;
public class ScannerLoop{
    Scanner scan=new Scanner(System.in);
    int n, sum=0;
    public void input(){
        try{
            System.out.println("Enter number. Non-Number will stop input: ");
            while(scan.hasNextInt()){
                n=scan.nextInt();
                compute();
            }
            scan.close();
            System.out.println("Total: "+sum);
        }
        catch(NumberFormatException e){
            System.out.println("Error Code: "+e);
            System.exit(0);
        }
    }

    public void compute(){
        sum+=n;
    }

    public static void main(String[] args){
        ScannerLoop loop=new ScannerLoop();
        loop.input();
    }
}

Output:-
Enter number. Non-Number will stop input:
1
2
3
e
Total: 6