Convert Set into List
import java.util.ArrayList; import java.util.Date; import java.util.HashSet; import java.util.List; import java.util.Set; public class Main { public static void main(String[] args) { Set<Object> set = new HashSet<Object>(); set.add("A"); set.add(new Long(10)); set.add(new Date()); List<Object> list = new ArrayList<Object>(set); for (int i = 0; i < list.size(); i++) { Object o = list.get(i); System.out.println("Object = " + o); } } }