Reports calls to Enumeration methods that are used on collections and may be replaced with equivalent Iterator constructs.

Example:

Enumeration<String> keys = map.keys();
  while (keys.hasMoreElements()) {
    String name = keys.nextElement();
  }

After the quick-fix is applied:

Iterator<String> iterator = map.keySet().iterator();
  while (iterator.hasNext()) {
    String name = iterator.next();
  }