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

public class ScannerReadingNumbersFromFile 
{
	public static void main(String[] args) throws IOException
	{
		Scanner file = new Scanner(new File("numbers.txt"));
		// the file numbers.txt must contain integers separated by spaces or on different
		// lines and the file must be located at the root level of the project folder
		int num = 0;
		int sum = 0;
	
		// this loop continues until it has read all the numbers in the file
		while (file.hasNext())	
		{
			num = file.nextInt();
			sum += num;
		}
		
		System.out.println("The sum is " + sum);
	}
}