Help with while statement

Hello friends,

I am new to Java. I want to create a application that keep asking question untill user exit the question. should be very simple. i do not know how to make a loop that will do it. if anyone can help, i will be very thankful.

Thanks
indianj

Here is my code:

Code:

---


  import javax.swing.*;
import java.util.Scanner;

public class HW2part2 {

    public static void main (String [] args){
            String sex;
            String father;
            String mother;
           
            int  mfSex;
            int Hfather;
            int Hmother;
           
           
            JOptionPane.showMessageDialog(null,":: Health Care Center ::","..: Welcome to Hadik's Movie Place :..",JOptionPane.INFORMATION_MESSAGE);
             
            sex = JOptionPane.showInputDialog("Enter Sex of Child\n1. Male\n2. Female");
            mfSex = Integer.parseInt(sex); 
                   
                father = JOptionPane.showInputDialog("Enter the Height of the father");
            Hfather = Integer.parseInt(father);
                       
                    mother = JOptionPane.showInputDialog("Enter the Height of the mother");
                  Hmother = Integer.parseInt(mother); 
                           
            boolean  nogender;       
                    do
                            {
                           
                      if (mfSex == 1){
                 
                                   
                            int Hmale_child = ((Hmother * 13/12)+ Hfather)/2;
                                    double Hmale_childFeet = Hmale_child * 0.0833;
                                   
                            System.out.println("Childs height is " + Hmale_child + " inches and " + Hmale_childFeet + " feet");
                            JOptionPane.showMessageDialog(null,"Male Child's Height is: "+Hmale_child+" Inch and "+Hmale_childFeet+"Feet","..: Welcome to Hadik's Movie Place :..",JOptionPane.INFORMATION_MESSAGE);
                               
                                System.exit (0);
                    }
                   
                    if (mfSex == 2){

                            int Hfemale_child = ((Hfather * 12/13)+ Hmother)/2;
         
                              double Hfemale_childFeet = Hfemale_child * 0.0833;
                              JOptionPane.showMessageDialog(null,"female Child's Height is: "+Hfemale_child+" Inch and "+Hfemale_childFeet+"Feet","..: Welcome to Hadik's Movie Place :..",JOptionPane.INFORMATION_MESSAGE);
                     
                                break;
                    }
                   
                    else{
                            nogender=true;
                           
    //                System.out.println("insterted the wrong number");       
                    }
                   
            }
            while (nogender);
           
    }
   
   
}

---

I don't think I really get your question but if you want to exit when the user presses the "Cancel" button, you can do something like:

Code:

---

        if (sex == null) {
            JOptionPane.showMessageDialog(null, "Bye bye");
            System.exit(0);
        }

---