Java Utililty Methods List Join

List of utility methods to do List Join

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Description

The list of methods to do List Join are organized into topic(s).

Method

Stringjoin(List s, String delimiter)
join 
int capacity = 0;
int delimLength = delimiter.length();
Iterator<? extends CharSequence> iter = s.iterator();
if (iter.hasNext()) {
    capacity += iter.next().length() + delimLength;
StringBuilder buffer = new StringBuilder(capacity);
iter = s.iterator();
...
Stringjoin(List items, String conjunction)
String.join is available only with Java 1.8. 
StringBuilder sb = new StringBuilder();
boolean first = true;
for (Object x : items) {
    if (first) {
        first = false;
    } else {
        sb.append(conjunction);
    if (x == null) {
        sb.append("<null>");
    } else {
        sb.append(x.toString());
return sb.toString();
Stringjoin(List items, String separator)
join 
StringBuilder sb = new StringBuilder();
for (int i = 0; i < items.size(); i++) {
    if (i > 0) {
        sb.append(separator);
    sb.append(items.get(i).toString());
return sb.toString();
...
Stringjoin(List list)
join 
return join(list, DELIM);
Stringjoin(List olist, String glue)
join 
return olist.toString();
Stringjoin(List valueList, String separator)
join 
if (valueList == null || valueList.size() == 0) {
    throw new IllegalArgumentException("valueList might not be null or empty!");
if (separator == null) {
    throw new IllegalArgumentException("separator might not be null!");
StringBuilder sb = new StringBuilder();
for (int i = 0; i < valueList.size(); i++) {
...
Stringjoin(List words, String iDelimiter)
Join a list of words into a single string using the specified delimiter. 
StringBuilder str = new StringBuilder();
if (words.size() == 0) {
    return str.toString();
int i;
for (i = 0; i < words.size() - 1; i++) {
    str.append(words.get(i));
    str.append(iDelimiter);
...
Listjoin(List list, T element)
Creates a list that contains all elements of a given list with an additional appended element. 
List<T> result = new ArrayList<T>(list.size() + 1);
result.addAll(list);
result.add(element);
return result;
Stringjoin(List _items, String _delim)
join 
if (null == _items) {
    return null;
return join(_items.toArray(), _delim);
Stringjoin(List arr, String seperator)
join 
StringBuilder str = new StringBuilder();
boolean isFirst = true;
for (Object item : arr) {
    if (!isFirst) {
        str.append(seperator);
    str.append(item);
    isFirst = false;
...