Moving Toward Object-Oriented Programming - Beginning Java Programming: The Object-Oriented Approach - page 104

void registerForCourse(Course c) {
c.registerStudent(this);
}

void unregisterForCourse(Course c) {
c.unregisterStudent(this);
}
}

4.

Create a Program class containing the main method:

class Program {
public static void main(String[] args) {
p("Welcome to the course administration program");
p("--------------------------------------------");
p("");

p("Creating two courses...");
Course courseA = new Course("First Course");
Course courseB = new Course("Second Course");

p("- courseA ID is: "+courseA.id);
p("- courseA name is: "+courseA.getName());
p("- courseB ID is: "+courseB.id);
p("- courseB name is: "+courseB.getName());
p("");

p("Creating two students...");
Student student1 = new Student("Alice", "The Student");
Student student2 = new Student("Bob", "McStudent");

p("- student1 ID is: "+student1.id);
p("- student1 name is: "+student1.getFirstName()+", "+
student1.getLastName());
p("- student2 ID is: "+student2.id);
p("- student1 name is: "+student2.getFirstName()+", "+
student2.getLastName());
p("");

p("Registering for courses...");
student1.registerForCourse(courseA);
student1.registerForCourse(courseB);
courseA.registerStudent(student2);

p("- courseA number of students: "+courseA.nrOfRegisteredStudents());
p("- courseB number of students: "+courseB.nrOfRegisteredStudents());
}

static void p(String l) {
System.out.println(l);
}
}

5.

To run this program from Eclipse, make sure the Program class is open and the main method is
active (by putting your cursor inside the method body), and then press the Run button. Eclipse will
show you the name of the class that contains the main method that will be run.