Java Utililty Methods List Join

if (objs == null)
    return "";
return join(objs, delim, 0, objs.size());

String rs = "";
StringBuilder ret = new StringBuilder();
for (T t : target) {
    ret.append(t).append(splite);
if (ret.lastIndexOf(",") > 0) {
    rs = ret.substring(0, ret.lastIndexOf(","));
return rs;

return join(tokens, delimiter, 0, tokens.size());

StringBuilder result = new StringBuilder();
for (Object value : values) {
    String v = value.toString().trim();
    if (hasLength(v)) {
        if (result.length() > 0) {
            result.append(separator);
        result.append(v);
...

List<T> result = new ArrayList<T>();
for (List<T> list : lists) {
    result.addAll(list);
return result;

int size = 0;
for (List<T> l : ls) {
    size += l.size();
ArrayList<T> joint = new ArrayList<T>(size);
for (List<T> l : ls) {
    joint.addAll(l);
return unmodifiableList(joint);

List<X> list = new ArrayList<X>();
for (List<X> element : elements) {
    list.addAll(element);
return list;

if (_strings == null) {
    return null;
if (_delimiter == null) {
    _delimiter = "";
StringBuilder sb = new StringBuilder();
for (int i = 0; i < _strings.size(); i++) {
...

StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < strings.size(); i++) {
    String part = strings.get(i);
    if (i != 0)
        stringBuilder.append(delimiter);
    stringBuilder.append(part);
return stringBuilder.toString();
...

if (joinees.isEmpty()) {
    return "";
} else {
    StringBuilder joined = new StringBuilder();
    joined.append(joinees.get(0));
    for (String s : joinees.subList(1, joinees.size())) {
        joined.append(joiner);
        joined.append(s);
...