How To Make A Addition Calculator In Java Using JOption

How To Make A Addition Calculator In Java Using JOption
Okay guys today i will be teaching you how to make a simple addition calculator using Joption in java, I saw someone wrote some codes to calculate addition also it uses Java Scanner. This is that program .
import java.util.Scanner;

class basic_cal
{
  public static void main(String args[])
  {
   Scanner shim = new Scanner(System.in);
   double first_number,second_number,answer;
   System.out.println("Enter First Number : ");
   first_number = shim.nextDouble();
   System.out.println("Enter Second Number : ");
   second_number = shim.nextDouble();
   answer = first_number + second_number;
   System.out.println("Answer : " + answer);
   }
}   
Okay now i saw that and got an idea to make the same thing with Joption , Joption is like the messagebox we have in c# and vb.net ok , this is the program i wrote :