Strängkonkatenering stream

private String getUnikaEpostadresser(List<AnvandareEntity> anvandareEntityList) {
        return anvandareEntityList.stream()
                .map(AnvandareEntity::getEpost)
                .filter(epost -> StringUtils.isNotBlank(StringUtils.defaultString(epost).trim()))
                .collect(joining("; "));
    }