Strängkonkatenering

private String getUnikaEpostadresser(List<AnvandareEntity> anvandareEntityList) {
       HashSet<String> ePostAdresserHash = new HashSet<String>();
       for(AnvandareEntity anvandare: anvandareEntityList) {
           if(StringUtils.isNotBlank(anvandare.getEpost())) {
               ePostAdresserHash.add(anvandare.getEpost().trim());
           }
       }

       StringBuffer ePostadresser = new StringBuffer("");
       boolean firstEpostadress = true;
       Iterator iterator = ePostAdresserHash.iterator();
       while (iterator.hasNext()) {
           ePostadresser.append((firstEpostadress ? "" : "; ") + iterator.next());
           firstEpostadress = false;
       }
       return ePostadresser.toString();
   }