Collection to Iterable

Question

How can I get a java.lang.Iterable from a collection like a Set or a List? Thanks!

Answer 1

A Collection is an Iterable.

So you can write:

public static void main(String args[]) {     List<String> list = new ArrayList<String>();     list.add("a string");      Iterable<String> iterable = list;     for (String s : iterable) {         System.out.println(s);     } } 

Answer 2

It's not clear to me what you need, so:

this gets you an Iterator

SortedSet<String> sortedSet = new TreeSet<String>(); Iterator<String> iterator = sortedSet.iterator(); 

Sets and Lists are Iterables, that's why you can do the following:

SortedSet<String> sortedSet = new TreeSet<String>(); Iterable<String> iterable = (Iterable<String>)sortedSet;