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import java.util.Observable;
import java.util.Observer;
class MyObservable extends Observable {
public void drinkPotion() {
name = "java2s ";
setChanged();
notifyObservers();
}
public String getName() {
return name;
}
private String name = "java2s";
}
class Person implements Observer {
public Person(String name, String says) {
this.name = name;
this.says = says;
}
public void update(Observable thing, Object o) {
System.out.println("It's " + ((MyObservable) thing).getName() + "\n" + name + ": " + says);
}
private String name;
private String says;
}
public class MainClass {
public static void main(String[] args) {
MyObservable man = new MyObservable();
Observer[] crowd = {
new Person("A", "a"),
new Person("B", "b"),
new Person("C", "c"),
new Person("D", "d"),
new Person("E", "e") };
for (Observer observer : crowd) {
man.addObserver(observer);
}
man.drinkPotion();
}
}
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