String ldapSearchBase = "CN=Users,dc=ecm,dc=ibm,dc=local";
    String searchFilter = "(&(objectClass=user)(objectClass=person)(sAMAccountName=" + uid + "))";
    DirContext ctx = getConnection();

   SearchControls constraints = new SearchControls();
   constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
   String[] attrIDs = { "userPassword" };
   constraints.setReturningAttributes(attrIDs);
   SearchResult searchResult=null;
   NamingEnumeration<SearchResult> answer = ctx.search(ldapSearchBase, searchFilter, constraints);
   while (answer.hasMoreElements()) {
           searchResult = (SearchResult)answer.nextElement();
            System.out.println("searchResult "+searchResult);
            Attributes attributes = searchResult.getAttributes();
            System.out.println("attributes:"+attributes);
   }

searchResult CN=test: null:null:No attributes
   attributes:No attributes