//
// Guess.java: a silly program which forces the user to enter
//             a number that's either less than 1 or greater than 999
//

import javax.swing.*;

public class Guess
{
   public static void main(String[] args)
   {
      String numstr = JOptionPane.showInputDialog("Enter number: ");
      if ( numstr == null || numstr.length() == 0 )
         JOptionPane.showMessageDialog(null, "You didn't enter anything!");
      int num = Integer.parseInt(numstr);
      while ( 1 <= num && num <= 1000 )
      {
         numstr = JOptionPane.showInputDialog("Sorry, wrong number. Re-enter: ");
         num = Integer.parseInt(numstr);
      }
      if ( num > 1000 )
         JOptionPane.showMessageDialog(null, "Final number is large: " + num);
      else
         JOptionPane.showMessageDialog(null, "Final number is not positive.");
   }
}