StringBuilder sb = new StringBuilder();
StringBuilder sbId = new StringBuilder();
for (LMSLabConfigLabClassGroup lmsLabConfigLabClassGroup:lmsLabConfigLabClassGroups) {
    LabClassLMSGroup labClassLMSGroup = lmsLabConfigLabClassGroup.getLabClassGroup();
    if (labClassLMSGroup != null) {
        if 
 
(sb.length() > 0) {
            sb.append(",");
        }
        sb.append(labClassLMSGroup.getName());

        if (sbId.length() > 0) {
            sbId.append(",");
        }
        sbId.append(labClassLMSGroup.getId());
    }
}
dto.setGroupName(sb.toString());
dto.setGroupId(sbId.toString());