import java.util.*;
import java.text.*;
import javax.swing.*;
public class Assignment2
{
   //Create and display complete student information for each student
   // whose name in given in a list of student's names   
   public static void main(String[] args)
   {
      String[] STUDENT_NAMES = {"Jack Felldown", "Jill Tumbling", "Simple Simon",
                                "Missey Muffet", "Georgie Porgy", "Bobby Shafto"};

      for (String name : STUDENT_NAMES)
      {
         //Create a new CollegeStudent with the current name
         CollegeStudent student = null;                              //****(1)
         
         //Compose and display the CollegeStudent's transcript
         JOptionPane.showMessageDialog(null, transcript(student) );
      }
   }
 
   //Compose a transcript for a given CollegeStudent
   // @param student: the student whose transcript is to be composed
   private static String transcript(CollegeStudent student)
   {
      //For each of the available courses
      for (CollegeCourse course : CollegeCourse.values() )
      
         if ((new Random()).nextBoolean())  //Randomly decide if to select
         {
            //Assign a randomly chosen letter grade
            LetterGrade grade = randomGrade();
            
            //Update student with selected course and letter grade            
            //student.update(course, grade);                         //****(2)                                              
         }
      
      return student + "\n" +
             "GPA: " + (new DecimalFormat("0.00")).format( gpa( student ) );
   }
   
   //Calculate a CollegeStudent's Grade Point Average (GPA)
   // @parameter janeDoe: the CollegeStudent whose GPA is to be calculated
   private static double gpa(CollegeStudent student)
   {
      int credits = 0;  //total earned credits for the given student //****(3)
      int points  = 0;  //total grade points for the given student   //****(4)
      
      return ( credits == 0 ? 0.0 : (double)points / credits );
   }
   
   //Randomly select a LetterGrade
   private static final String DISTRIBUTION = "011122222222333333444";
   private static LetterGrade randomGrade()
   { 
      int index = (new Random()).nextInt(DISTRIBUTION.length());
      index = Integer.parseInt(DISTRIBUTION.substring(index, index+1));
      return LetterGrade.values()[index];
   }
}