copy a list in a set

[Marco Vanoli]

it is possible to copy one list in a set?
as:
List l = (List) x.getset();

My compiler give error.. is there a quickest way to not do a loop with iterator for addin every one set elements to the list?

tnKs

[marc weber]

You can't just cast a Set to type List because neither is a subtype of the other. However, you should be able to pass the Set instance to the constructor of a List (where it's upcast to Collection)...

import java.util.*;
 
class SetToList {
  public static void main(String[] args) {
    HashSet mySet = new HashSet();
    mySet.add("abc");
    mySet.add("def");
 
    ArrayList myList = new ArrayList(mySet);
    System.out.println(myList);
  }
}

[Layne Lund]

You can also create a Set from a List with the correct constructor:

Set mySet = new HashSet(myList);

Layne