public class EventSource { List<IevListener> listenList = new ArrayList<>(); public void addListen(IevListener listener){ listenList.add(listener); } public void happen(){ System.out.println("event happen.."); for(IevListener listener:listenList){ listener.afterHappen(); } } }
public class EvListener1 implements IevListener { @Override public void afterHappen() { // TODO Auto-generated method stub System.out.println("listen1 invoke.."); } }
public class EvListener2 implements IevListener { @Override public void afterHappen() { // TODO Auto-generated method stub System.out.println("listen2 invoke.."); } }
public interface IevListener { void afterHappen(); }
public class TestDemo { public static void main(String[] args) { EventSource es = new EventSource(); es.addListen(new EvListener1()); es.addListen(new EvListener2()); es.happen(); } }