using an Array list

[toad]

Code:

public class Course {
    private String name;
    private String[] students = new String[100];
    private int numberOfStudents;
    
    public Course(String name) {
        this.name = name;
    }
    
    public void addStudent(String student) {
        students[numberOfStudents] = student;
        numberOfStudents++;
    }
    
    public String[] getStudents() {
        return students;
    }
    
    public int getNumberOfStudents() {
        return numberOfStudents;
    }
    
    public String getName() {
        return name;
    }
}

I need to rewrite the course class using an ArrayList to replace an array to store students. I'm a day into learning about ArrayLists and I am terribly stuck.

[hardwired]

Trail: Collections
List Implementations

Code:

import java.util.*;

public class Course {
    private String name;
    // An ArrayList grows as you add to it.
    // Choose one of the following according to the
    // version of java you are using:
    // This is for j2se 1.5+ with generics:
    private List<String> students = new ArrayList<String>();
    // Use this for non-generics: j2se 1.4 or earlier:
    //private List students = new ArrayList();
    
    public Course(String name) {
        this.name = name;
    }
    
    public void addStudent(String student) {
        students.add(student);
    }
    
    public String[] getStudents() {
        int size = getNumberOfStudents();
        // Find this method in the ArrayList class api
        // Methods Summary section.
        return students.toArray(new String[size]);
    }
    
    public int getNumberOfStudents() {
        return students.size();
    }
    
    public String getName() {
        return name;
    }
}