Class Roster: This class will implement the functionality of all roster for school. It will , in essence, manage an ArrayList of Student objects.

Client file:   tester file

• Class or static variables
  • Java

    public static final int MAX_NUM

    1	public static final int MAX_NUM

    
    representing the maximum number of students allowed on the roster
• Instance Variables
  • Java

    ArrayList<Student> myStudents

    1	ArrayList<Student> myStudents

    
    : an ArrayList storing Student Objects

//during which period of the day does this roster meet

Constructors

• a default constructor should initialize the list to empty strings
• single parameter constructor with the period as a parameter
  Both constructors should initialize the instance variables

Methods

• Accessors
  • private int indexOf(Student st) //@returns index of Student St or -1
  • public boolean contains(Student st) //@returns true if studentName is in roster
  • public boolean contains(int ssnId)  //@returns true if a student in the list has that SSN
  • public int getPeriod() // returns period
  • public Student retrieveBySSNId(int ssnId ) //@ returns Student associated with id. This should return null if the student does not exist.
  • public boolean equals(ClassRoster other) //@ returns whether or not rosters are equal
  • public ArrayList<Student> getStudents() //@returns the ArrayList of all students in the roster
  • public String toString()

Mutators:

• public boolean addStudent( Student st )  ;//if the size of the arraylist is less than MAX_NUM, add the student and return true; otherwise, return false and do not add student.
• public boolean addStudent(String studentName, int age) ;//adds student name and age to end of roster
  • Make sure that the total number of students does not exceed MAX_NUM.
• public Student removeStudent(int ssnId ) // removes student from roster based on id.
• public Student removeStudent(String name)  //removes student based on name.
• public  Student removeStudent( Student st) //removes student st.