billingservice.java~

来自「designpatterns for aop」· JAVA~ 代码 · 共 15 行

package designpatterns.observer.java;

public class BillingService implements Observer {


	public void generateChargeFor(Playable playable) {
		System.out.println("generating charge for : " + playable.getName());
	}

	public void update(Subject subject) {
		generateChargeFor((Playable) subject);
	}

}