//Course.java

import java.util.*; import java.io.*; /****************************************************** * A list of students in a course *****************************************************/ public class Course{

/** collection of Students */ private ArrayList roster;

/***************************************************** Constructor for objects of class Course *****************************************************/ public Course(){ roster = new ArrayList(); }

/***************************************************** @return the number of students in the course. This will be ONE line of code. *****************************************************/ public int courseSize(){ /** Your code goes here */ } /***************************************************** Add a student to the course *****************************************************/ public void addStudent(Student s){ roster.add(s); } }

//Student.java

import java.text.*; /************************************************* * A simple student class including name and gpa. * *************************************************/ public class Student{ /** student name */ private String first, last; /** student GPA */ private double gpa;

/************************************************ Constructor for Student ************************************************/ public Student(String f, String l, double d){ first = f; last = l; gpa = d; } /************************************************ get GPA @return GPA ************************************************/ public double getGPA(){ return gpa; }

/************************************************ to String @return String representation of the object ************************************************/ public String toString(){ DecimalFormat fmt = new DecimalFormat("#.0"); return first + " " + last + " " + fmt.format(gpa); } public static void main (String [] args){ Student s = new Student ("Henry", "Walker", 3.6); System.out.println(s); } }