Why aren't Enumerations Iterable?

Question

In Java 5 and above you have the foreach loop, which works magically on anything that implements Iterable:

for (Object o : list) {
  doStuff(o);         


        

Answer 1

Enumeration hasn't been modified to support Iterable because it's an interface not a concrete class (like Vector, which was modifed to support the Collections interface).

If Enumeration was changed to support Iterable it would break a bunch of people's code.