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

import it313.util.Observable;
public class MessageBoard extends Observable {
    private String message;

    // When lastMessage is changed, it is added
    // to the message archive and all observers
    // are notified.
    public void changeMessage(String theMessage) {
        message = theMessage;
        setChanged( );
        notifyObservers(message);
    }
}