Tirer hasard les éléments d'un vecteur java

private static final Random rd = new Random();

public static <E> E ploufplouf(List<E> list)
{
	return list.get(rd.nextInt(list.size()));
}

public static void main(String...args)
{
	Vector<String> v = new Vector<String>();
		v.add("tata");
		v.add("tete");
		v.add("titi");
		v.add("toto");
		v.add("tutu");
		
	System.out.println(ploufplouf(v));
	
	ArrayList<String> al = new ArrayList<String>();
		al.add("papa");
		al.add("pepe");
		al.add("pipi");
		al.add("popo");
		al.add("pupu");

	System.out.println(ploufplouf(al));
}