Program to add two integer numbers read from a text file and displaying results on console

Question

Even after lots of trial and error, I am unable to figure out how to write a java program that adds 2 integers (read from a text file) and displays addition result on the console.

I tried using FileInputStream, DataInputStream classes ...

Example explaining what I exactly need !

Suppose there are 2 integers stored in a text file (sample.txt) .... Let 1 and 2 be the integers.

I would like to read those integers from the file and display their sum (= 3) on the console

Any help would be appreciated !

P.S: I am a beginner in Java, so please be as simple as you can wrt coding !

Answer 1

Here's something you could start with:

import java.util.Scanner;
import java.io.*;

public class MyClass {

    public static void main(String[] args) throws IOException {

        Scanner s = new Scanner(new File("sample.txt"));
        int tmp1 = s.nextInt();
        int tmp2 = s.nextInt();
        System.out.println(tmp1 + tmp2);
    }
}

Create the text file directly under the Project root in Eclipse.

Sample content can be:

1 2