Adarsh Cavale2,262 Points
You said Set is an interface. How come you don't have to implement the interface?
Wouldnt you have to put something in the Example class like "implements ..." like how we did in the Treet class for "implements Comparable, Serializable" ?
We are using another class that implements the
Set interface; in the source code of this one, we would find the
implements Set line. If we wanted to create our own
Set implementation, we would indeed need to implement the interface.