I found this question from one of my favorite
SCJP websites. It has an answer, but I doubt it, so I put this question again.
Which statements about listeners are true?
a. At most one listener can be added to any single component.
b. If multiple listeners are added to a single component, the order of invocation of the listener is not specified.
c. The return value from a listener is used to control the invocation of other listeners
d. In the
java package, listener methods generally take an argument which is an instance of the some subclass of java.awt.AWTEvent class
They said the answer were b,d. Yes, I agree to b, but I'm not sure of d. Can somebody give me an answer for this?