SumOfIntegers.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

class SumOfIntegers {
    public static void main(String[] args) {
        String pathToFile = args[0];
        File file = new File(pathToFile);
        int sum = 0;
        try (Scanner scanner = new Scanner(file)) {
            while (scanner.hasNextInt()) {
                sum += scanner.nextInt();
            }
        } catch (FileNotFoundException e) {
            System.out.println("No file found: " + pathToFile);
        }
        System.out.println(sum);
    }
}