Java Utililty Methods List from Array

if (List.class.isAssignableFrom(iterable.getClass())) {
    return (List<T>) iterable;
} else {
    List<T> list = new ArrayList<T>();
    for (T item : iterable) {
        list.add(item);
    return list;
...

List<T> list = new ArrayList<T>();
for (T item : iterable) {
    list.add(item);
return list;

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

List<T> list = new ArrayList<T>();
while (iterator.hasNext())
    list.add(iterator.next());
return list;

StringBuffer buffer = new StringBuffer();
if (list != null) {
    if (list.size() == 1) {
        buffer.append(list.get(0));
    } else {
        for (String element : list) {
            buffer.append(element);
            buffer.append(", ");
...

if (array == null)
    return Collections.emptyList();
List<Long> ret = new ArrayList<Long>(array.length);
for (long element : array) {
    ret.add(element);
return ret;

List<Number> list = new ArrayList<Number>();
if (info instanceof int[]) {
    int[] array = (int[]) info;
    for (int i : array) {
        list.add(i);
} else if (info instanceof long[]) {
    long[] array = (long[]) info;
...

if (o == null)
    return null;
if (o instanceof Collection) {
    return asList((Collection<?>) o, cls);
return asList(newList(o), cls);

ArrayList single = new ArrayList(1);
single.add(theone);
return single;

return (List<Object>) value;