Java Utililty Methods List Null Empty

return Collections.unmodifiableList(new ArrayList<T>(0));

int cnt = 0;
for (T i : list)
    if (i != null) {
        if (cnt == n)
            return i;
        cnt++;
return null;
...

if (items == null) {
    return null;
List<T> results = new ArrayList<T>();
for (T next : items) {
    if (next != null) {
        results.add(next);
if (results.size() == 0) {
    return null;
return results;

if (list == null) {
    return Collections.emptyList();
return list;

if (list == null) {
    return 0;
int count = 0;
for (Object obj : list) {
    if (obj != null) {
        count++;
return count;

List<Long> result = new ArrayList<Long>();
if (idList == null || idList.isEmpty())
    return result;
for (Long id : idList)
    if (id != null)
        result.add(id);
return result;

String[] tokanizedSearchTerm = getTokanizedSearchTerm(searchTerm.toUpperCase());
List<Integer> indexLocations = new ArrayList<Integer>();
for (int i = 0; i < pageWords.size(); i++) {
    for (String token : tokanizedSearchTerm) {
        if (token.equals(pageWords.get(i))) {
            indexLocations.add(i);
return indexLocations;

List<String> results = new ArrayList<String>();
if (input == null) {
    return results;
for (String lineItem : input.split(regexSplitter)) {
    if (ignoreEmptyTokens && lineItem.trim().equals("")) {
        continue;
    results.add(lineItem);
return results;