hi could anyone explain me about how the event Listeners work in java,To get the data based on the event occurs in outside the application.

I have this method in one of my API class I am not understanding how this methods are going to work.

publicinterfaceSBXPCXMLEventListener{
   publicvoidOnReceiveEventXML(String eventXML);
   }
   privatestaticList<SBXPCXMLEventListener> listenerList =newArrayList<SBXPCXMLEventListener>();
   protectedstaticvoid fireXMLEvent(String xml){
   Iterator<SBXPCXMLEventListener> iter = listenerList.iterator();
   while(iter.hasNext()){
  iter.next().OnReceiveEventXML(xml);
   }
   }
   publicstaticvoid addXMLListener(SBXPCXMLEventListener listener){
  listenerList.add(listener);
   }
   publicstaticObject removeXMLListener(SBXPCXMLEventListener listener){
   return listenerList.remove(listener);
   }

i have done like this.This is used to capture the events from the fingerprint machine when run this class I am not getting any data from the machine when i did thumb impression in the machine.

public class EventListnere implements SBXPCXMLEventListener {

    public static void main(String[] args) {

        boolean flag = SBXPCProxy.ConnectTcpip(1, "10.0.0.8", 5005, 1234);

        System.out.println("flag = " + flag);

//        SBXPCProxy.st

//        System.out.println("before "+System.currentTimeMillis());

        boolean flag1 = SBXPCProxy.StartEventCapture(1, 1, 1);

        EventListnere el = new EventListnere();

        SBXPCProxy.addXMLListener(el);

    }

    @Override

    public void OnReceiveEventXML(String eventXML) {

        System.out.println("eventXML = " + eventXML);

    }

}