InteractRunner.java

import java.util.Scanner;


public class InteractRunner {

    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);

        try {
            Calculator calc = new Calculator();
            String exit = "no";

            while (!exit.equals("yes")){
                System.out.println("Enter first arg: ");
                String first = reader.next();
                System.out.println("Enter second arg: ");
                String second = reader.next();

                calc.add(Integer.valueOf(first),Integer.valueOf(second));
                System.out.println("Result: "+calc.getResult());
                calc.cleanResult();
                System.out.println("Exit: yes/no ");
                exit = reader.next();
            }

        } finally {
            reader.close();
        }
    }
}