Java Utililty Methods Collection Element Get

if (col == null) {
    return null;
Object[] arr = new Object[col.size()];
System.arraycopy(col.toArray(), 0, arr, 0, col.size());
return arr;

if (collection.isEmpty()) {
    return EMPTY_ELEMENT_ARRAY;
} else {
    return collection.toArray();

String objectName = "";
if (currentObjectColl != null && !((Collection) currentObjectColl).isEmpty()) {
    objectName = (((Collection) currentObjectColl).iterator().next()).getClass().getName();
} else if (prevObjectColl != null && !((Collection) prevObjectColl).isEmpty()) {
    objectName = (((Collection) prevObjectColl).iterator().next()).getClass().getName();
return objectName;

Iterator<?> it = data.iterator();
boolean first = true;
StringBuffer ret = new StringBuffer();
while (it.hasNext()) {
    if (first == false) {
        ret.append(seperator);
    } else {
        first = false;
...

if (input == null || input.isEmpty()) {
    return EMPTY_STRING;
return getUsString(input.toArray(new String[input.size()]));

if (col instanceof List)
    return ((List<T>) col).get(index);
int i;
Iterator<T> it;
for (i = 0, it = col.iterator(); i < index && it.hasNext(); it.next())
    ;
return it.hasNext() ? it.next() : null;

String result = null;
if (entityName != null && entityName.contains("@")) {
    String lastPart = entityName.substring(entityName.lastIndexOf('@') + 1);
    result = authzProvidersNames.contains(lastPart) ? lastPart : null;
return result;

assert idx < vals.size();
int i = 0;
for (T val : vals) {
    if (idx == i)
        return val;
    i++;
assert false : "Should never be reached.";
...

if (collection == null || collection.isEmpty()) {
    return null;
final Map<T, Integer> histogram = getHistogram(collection);
List<T> list = new ArrayList<T>();
list.addAll(histogram.keySet());
Collections.sort(list, new Comparator<T>() {
    @Override
...