Java Utililty Methods Set to List

if (set != null && !set.isEmpty()) {
    List<Object> list = new ArrayList<Object>();
    for (Object obj : set) {
        list.add(obj);
    return list;
return null;
...

if (null == typeSet) {
    return null;
List<String> list = new ArrayList<String>();
Iterator<String> typeItr = typeSet.iterator();
while (typeItr.hasNext()) {
    list.add(typeItr.next());
return list;

List<T> list = new ArrayList<T>();
if (set != null && set.size() > 0) {
    for (T t : set) {
        list.add(t);
return list;

if (set == null)
    return null;
List<T> list = new ArrayList<T>(set.size());
Iterator<T> it = set.iterator();
while (it.hasNext()) {
    list.add(it.next());
return list;
...

List<T> l = new ArrayList<>(set);
return l;

List list = new ArrayList();
if (set != null) {
    for (Iterator iter = set.iterator(); iter.hasNext();) {
        Object object = (Object) iter.next();
        if (object != null) {
            list.add(object);
return list;

Iterator iterator = set.iterator();
LinkedList linkedlist = new LinkedList();
while (iterator.hasNext()) {
    linkedlist.add(iterator.next());
return linkedlist;

List<T> list = new ArrayList<T>(0);
list.addAll(set);
return list;

if (set == null) {
    return null;
return new ArrayList<T>(set);

ArrayList<T> list = new ArrayList<T>();
for (T attr : set) {
    list.add(attr);
return list;