Java Utililty Methods Collection Join

List of utility methods to do Collection Join

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Description

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

Method

Stringjoin(Collection list, String delimiter)
Joins the list members into a delimiter separated String. 
StringBuilder sb = new StringBuilder();
int index = 0;
for (T line : list) {
    sb.append(line);
    if (list.size() != index + 1) {
        sb.append(delimiter);
    index++;
...
Stringjoin(Collection s, String delimiter)
join 
StringBuffer buffer = new StringBuffer();
Iterator<T> iter = s.iterator();
while (iter.hasNext()) {
    buffer.append(iter.next());
    if (iter.hasNext()) {
        buffer.append(delimiter);
return buffer.toString();
Stringjoin(Collection things, String delim)
join 
return join(things.toArray(), delim);
Stringjoin(Collection values, String join)
join 
StringBuilder result = new StringBuilder();
String delim = "";
for (T value : values) {
    result.append(delim);
    result.append(value == null ? "null" : value.toString());
    delim = join;
return result.toString();
...
Stringjoin(final char _separator, final boolean _quotes, final Collection _list, final String _emptyString)
A list of string is joined to one string. 
final StringBuilder ret = new StringBuilder();
boolean first = true;
if (_list.isEmpty()) {
    if (_emptyString != null) {
        ret.append(_emptyString);
} else {
    for (final String elem : _list) {
...
Stringjoin(final Collection collection, String delimiter)
join 
if (collection == null || collection.size() == 0) {
    return EMPTY;
final StringBuilder sb = new StringBuilder(collection.size() * 16);
for (Object element : collection) {
    sb.append((String) element);
    sb.append(delimiter);
return sb.toString().substring(0, sb.lastIndexOf(delimiter));
Stringjoin(final Collection e, final String s)
Join a collection as a string 
if (e == null || e.size() == 0)
    return "";
final StringBuilder builder = new StringBuilder();
for (final Object o : e)
    builder.append(o).append(s);
final String r = builder.toString();
return r.substring(0, r.length() - s.length());
Stringjoin(final Collection items, final String glue)
Implementation of join using a StringBuffer 
final StringBuffer buffer = new StringBuffer();
for (final Object o : items) {
    if (buffer.length() > 0) {
        buffer.append(glue);
    buffer.append(o.toString());
return buffer.toString();
...
Stringjoin(final Collection coll, final String delimiter)
Join the Collection elements using the given delimiter. 
if (null == coll || coll.size() == 0) {
    return "";
StringBuffer buffer = new StringBuffer();
Iterator<?> iter = coll.iterator();
while (iter.hasNext()) {
    buffer.append(iter.next());
    if (iter.hasNext()) {
...
Stringjoin(final Collection coll, final String glue)
join 
return join(coll.toArray(new Object[coll.size()]), glue);