Java Utililty Methods Iterable to List

if (iterable instanceof List) {
    return (List<E>) iterable;
ArrayList<E> list = new ArrayList<E>();
if (iterable != null) {
    for (E e : iterable) {
        list.add(e);
return list;

return iterable == null ? new ArrayList<E>() : iteratorAsList(iterable.iterator());

for (T element : c) {
    list.add(element);

for (T element : c) {
    list.add(element);

return iterableToList(iterable, null);

ArrayList<T> result = new ArrayList<>();
for (T item : input) {
    result.add(item);
return result;

List<T> list = null;
if (iterable instanceof List) {
    list = (List<T>) iterable;
} else if (iterable instanceof Collection) {
    list = new ArrayList<T>((Collection<T>) iterable);
} else {
    list = new ArrayList<T>();
    Iterator<T> iterator = iterable.iterator();
...

String ret = "";
for (Iterator it = list.iterator(); it.hasNext();) {
    ret += it.next().toString();
    if (it.hasNext())
        ret += sep;
return ret;

return toList(i, 10);

ArrayList<T> coll = new ArrayList<T>();
for (T item : items) {
    coll.add(item);
return coll;