Java Utililty Methods Collection Split

if (text == null)
    return;
if (text.length() == 0)
    return;
int index1 = 0;
int index2 = text.indexOf(separator);
if (index2 >= 0) {
    String token = null;
...

return getArrayStringBySplit(collection.toArray(), split);

if (split == null || split.isEmpty()) {
    split = ",";
List<String> values = new ArrayList<String>();
if (str == null)
    return values;
StringTokenizer tokenizer = new StringTokenizer(str, split);
values = new ArrayList<String>();
...

return getSymbolSplitString(collection.toArray(), symbol);

Collection<T> tmp = new ArrayList<>();
Iterator it = d.iterator();
int k = Math.max(0, n);
while (it.hasNext() && k > 0) {
    tmp.add((T) it.next());
    k--;
return tmp;
...

Object[] array = collections.toArray(new Object[0]);
int length = array.length;
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < length; i++) {
    stringBuilder.append(array[i]);
    if (i != length - 1) {
        stringBuilder.append(separator);
return stringBuilder.toString();

if (orig == null || orig.isEmpty() || batchSize < 1) {
    return Collections.emptyList();
int size = orig.size();
int len = calSplitLen(batchSize, size);
List<List<T>> result = new ArrayList<>(len);
List<T> list = null;
if (orig instanceof List) {
...

if (set.size() >= n) {
    @SuppressWarnings("unchecked")
    List<T>[] arrays = new List[n];
    int minSegmentSize = (int) Math.floor(set.size() / (double) n);
    int start = 0;
    int stop = minSegmentSize;
    Iterator<T> it = set.iterator();
    for (int i = 0; i < n - 1; i++) {
...

return split(collection, 500);

StringBuilder current = new StringBuilder();
for (int i = 0; i < string.length(); i++) {
    char ch = string.charAt(i);
    if (ch == ' ') {
        boolean isGluedSpace = i > 0 && string.charAt(i - 1) == '\\';
        if (!isGluedSpace) {
            into.add(current.toString());
            current = new StringBuilder();
...