Can a for loop be used in a JOptionPane.showMessageDialog?

Question

So I'm new here, and this is my first question...Is there a proper syntax for using the for loop in JOptionPane.showMessageDialog?

This is my current code and I know that it doesn't work. My code is for showing the factors of a certain integer and I want to know how can I show that in a JOptionPane.

String c = JOptionPane.showMessageDialog(null
,for(d=1;d<=c;d++){
   if(c%d==0){
     d+" "
   }
 }  
,"The factors of "+c+" are: "
,JOptionPane.INFORMATION_MESSAGE);

Answer 1

Thank you Petter Friberg for giving an answer, I found a solution to my problem thanks to you, although I didn't use all of your suggestions . So here's my code...

import java.util.*;
import javax.swing.*;
public class TestNo3{
    public static void main(String[] args) {
      JTextArea factorsArea = new JTextArea();
      JTextField inputInt1 = new JTextField(5);
      JPanel factorsPanel = new JPanel();
        factorsPanel.add(new JLabel("Enter an integer: "));
        factorsPanel.add(inputInt1);

     int int1 = JOptionPane.showConfirmDialog(null, factorsPanel
        ,"Show the factors of a number."
        ,JOptionPane.OK_CANCEL_OPTION);
          if(int1==JOptionPane.OK_OPTION){
            String inputIntS = inputInt1.getText();
            int inputIntI = Integer.parseInt(inputIntS);

            for(int numB=1;numB<=inputIntI;numB++){
              if(inputIntI%numB==0){
                String outputS = String.format("%5d", numB); 
                factorsArea.append(outputS);        
              }
            }

            JOptionPane.showMessageDialog(null, factorsArea
                ,"The factors of "+inputIntI+" are: "
                ,JOptionPane.INFORMATION_MESSAGE);      
          }
    }
}