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OTExample Observer/Hummingbird

Simple base class for the Observer pattern

(note, that this class bears no pre-planning for observing).

package flower_example;
 * @author Bruce Eckel (original Java example)
 * @author Miguel P. Monteiro (adaptation to OT/J)
 * Base class to play the Observer role
public class Hummingbird {
    private String _name;
    public Hummingbird(String name) {
        _name = name;
    //Reaction to
    public void breakfastTime() {
        System.out.println("Hummingbird " + _name + "'s time to have breakfast!");
    //Reaction to Flower.close
    public void bedTime() {
        System.out.println("Hummingbird " + _name + " goes to sleep!");

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