Mr RIght (JOptionPane)

import javax.swing.JOptionPane;


public class SUBTRACTION {

    public static void main(String[] args) {


        String string1 = JOptionPane.showInputDialog("Enter First NUmber");
        String string2 = JOptionPane.showInputDialog("Enter Second NUmber");
        String  string3 = JOptionPane.showInputDialog("Enter Third NUmber");
        String string4 = JOptionPane.showInputDialog("Enter Fourth NUmber");
        String string5 = JOptionPane.showInputDialog("Enter Fifth NUmber");
        String string6 = JOptionPane.showInputDialog("Enter Sixth NUmber");

        int num1 = Integer.parseInt(string1);
        int num2 = Integer.parseInt(string2);
        int  num3 = Integer.parseInt(string3);
        float  addnum1 = (num1+num2+num3);
        String addstring = "Addition of the first three input is: " + addnum1;

        int num4 = Integer.parseInt(string4);
        int num5 = Integer.parseInt(string5);
        int num6 = Integer.parseInt(string6);
        float addnum2 = (num4+num5+num6);
        String addstring1 = "Addition of the second three input is: " + addnum2;




        float subnum = addnum1 - addnum2;
        String substring = "Subtraction of " + addnum2 + " from " + addnum1 + " is: " + subnum;


        JOptionPane.showMessageDialog(null, addstring);
        JOptionPane.showMessageDialog(null, addstring1);
        JOptionPane.showMessageDialog(null, substring);

    }
}