Java Hashtable'dan Array

protected String[] hashToStringArray(Hashtable h)
throws NullPointerException {
Vector v = new Vector();

Enumeration e = h.keys();
while (e.hasMoreElements()) {
String k = e.nextElement();
v.add(h.get(k).toString());
}
String[] strArr = new String[v.size()];
v.copyInto(strArr);

return strArr;
}