What's the advantages of using iterator in java?
We can always use for loop to iterate a set, list, etc. For example, we can always use:
for(int i = 0; i < sth.size(); i ++)
to iterate a collection.
Why/when do we use iterator?
Asked
Active
Viewed 58 times
0
-
No, we cannot always do it. What if the collection is a Map? – Royal Bg Jul 22 '15 at 22:31
-
@RoyalBg `Map` isn't technically [`Collection`](https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html) :) – Pshemo Jul 22 '15 at 22:32
-
@Pshemo well, said that way you are right :) the `entrySet()` returns a collection, right? – Royal Bg Jul 22 '15 at 22:36
-
@RoyalBg Yes, and this set will be Iterable which means we can use `for-each` loop on it :) – Pshemo Jul 22 '15 at 22:37