import java.util.*;

/**
 * Class that represents a student
 * @author Barb Ericson
 */
public class Student
{
  //////////// fields ///////////////////
  private String firstName;
  private String lastName;
  private String pictureFileName;
  private List gradeList = new ArrayList();
  
  ////////////// constructors //////////////
  /**
   * No argument constructor.  All fields
   * are their default values 
   */
  public Student() {}
  
  /**
   * Constructor that takes the firstName, lastName,
   * and picture file name
   * @param firstName the first name to use
   * @param lastName the last name to use
   * @param pictureFile the name of the picture file
   */
  public Student(String firstName, String lastName,
                 String pictureFile)
  {
    this.firstName = firstName;
    this.lastName = lastName;
    this.pictureFileName = pictureFile;
  }
  
  //////////////// methods //////////////////
  
  /**
   * Method to get the first name
   * @return the student's first name
   */
  public String getFirstName() { return firstName; }
  
  /**
   * Method to set the first name
   * @param firstName the first name to use
   */
  public void setFirstName(String firstName) 
  { this.firstName = firstName; }
  
  /**
   * Method to get the last name 
   * @return the last name
   */
  public String getLastName() { return lastName; }
  
  /**
   * Method to set the last name
   * @param lastName the last name to use
   */
  public void setLastName(String lastName) 
  { this.lastName = lastName; }
  
  /**
   * Method to get the picture file name
   * @return the picture file name
   */
  public String getPictureFileName() 
  { return pictureFileName;}
  
  /**
   * Method to set the picture file name
   * @param pictureFile the picture file to use
   */
  public void setPictureFileName(String pictureFile)
  { pictureFileName = pictureFile; }
  
  /**
   * Method to add a grade
   * @param grade the grade to add to the list 
   * of grades
   */
  public void addGrade(double grade)
  {
    gradeList.add(new Double(grade));
  }
  
  /**
   * Method to calculate a grade point average
   * from the list of grades
   * @return the average of the grades 
   */
  public double getGradeAverage()
  {
    double total = 0;
    double grade = 0;
    Double tempDouble = null;
    
    // iterator through the list
    Iterator iterator = gradeList.iterator();
    while (iterator.hasNext())
    {
      tempDouble = (Double) iterator.next();
      grade = tempDouble.doubleValue();
      total = total + grade;
    }
    return total / gradeList.size();
  }
  
  /**
   * Main method for testing
   */
  public static void main(String[] args)
  {
    Student me = new Student("Barb","Ericson",null);
    me.addGrade(80.5);
    me.addGrade(93.5);
    me.addGrade(73.8);
    System.out.println(me.getGradeAverage());
  }
  
  }