Skole opgave. Hvad i alverden spørg de om?
En del af dagens lektie ... men jeg synes ikke spørgsmålet giver mening. Hvad siger i andre?Til dem der forstår, hvad er meningen så?
Exercise 4
(A) Why is there a problem for implementors of this interface to emit XEvents to subscribers implementing the EventListener interface?
public interface XEventEmitter{
public void addXEventListener(EventListener el);
public void removeXEventListener(EventListener el);
}
B) How could this problem be fairly well solved by redefining the methods above to expect an 'XEventAdapterInterface' which implements the EventListener interface. Define a possible
XEventAdapterInterface with a single method.
(C) What is the interface used to listen to simple JavaBean PropertyChangeEvents? (How is it similar to the XEventAdapterInterface defined in (b)?
