// compute travel time by highway vs. city streets
// This version uses dialogs for the prompts and output

import javax.swing.JOptionPane;

public class TravelGUI
{
   public static void main(String[] args)
   {
      String distance_string = 
         JOptionPane.showInputDialog("Enter distance in miles: ");
      double distance = Double.parseDouble(distance_string);
      double highway_time = distance / 40.0 * 60;
      JOptionPane.showMessageDialog(null,
                                    "Time to travel by highway: "
                                    + highway_time + " minutes");

      distance_string =
         JOptionPane.showInputDialog("Enter city street distance in miles: ");
      distance = Double.parseDouble(distance_string);
      double city_time = distance / 15.0 * 60;
      JOptionPane.showMessageDialog(null,
                                    "Time to travel by city streets: "
                                    + city_time + " minutes");

      if ( highway_time + 5 < city_time )
      {
         // the savings has to be greater than 5 minutes to take the highway
         JOptionPane.showMessageDialog(null, "We recommend taking the highway.");
      }
      else
      {
         JOptionPane.showMessageDialog(null, "We recommend taking the city streets.");
      }
   }
}