SumNumbersFromATextFile

import java.io.BufferedReader;
import java.io.FileReader;

public class SumNumbersFromATextFile {

    public static void main(String[] args) {
        BufferedReader reader;
        int sum = 0;
        try {
            reader = new BufferedReader(new FileReader("src/input.txt"));
            String line = null;
            while ((line = reader.readLine()) != null) {
               int number = Integer.parseInt(line);
               sum+=number;
            }
            System.out.println(sum);
        }
        catch (Exception e) {
            System.out.println("Error");
        }
    }
}