// Project: Observer
// Module: messageboard1
// Source code file: Main.java
// Illustrate the Observer software pattern.
// Student is the observer;
// MessageBoard is the observable.

public class Main {

    public static void main(String[] args) {

        // Test the Observer and Observable classes.
        MessageBoard board = new MessageBoard( );
        Student bob = new Student("Bob");
        Student alice = new Student("Alice");
        board.addObserver(bob);
        board.addObserver(alice);
        board.changeMessage("Homework 5 Description posted");
        System.out.println("Number of observers: " +
                board.countObservers( ));
    }
}