java-design-patterns/observer/src/main/java/com/iluwatar/App.java

package com.iluwatar;

/**
 * 
 * Observer pattern defines one-to-many relationship
 * between objects. The target object sends change
 * notifications to its registered observers.
 *
 */
public class App 
{
    public static void main( String[] args )
    {

    	Weather weather = new Weather();
    	weather.addObserver(new Orcs());
    	weather.addObserver(new Hobbits());
    	
    	weather.timePasses();
    	weather.timePasses();
    	weather.timePasses();
    	weather.timePasses();
    	
    }
}