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 items, char separator)
Creates a backslash escaped string, joining all the items. 
if (items == null)
    return "";
StringBuilder sb = new StringBuilder(items.size() << 3);
boolean first = true;
for (Object o : items) {
    String item = String.valueOf(o);
    if (first) {
        first = false;
...
Stringjoin(Collection items, String delim)
join 
if (items.isEmpty()) {
    return "";
StringBuilder sb = new StringBuilder();
for (Object o : items) {
    sb.append(o.toString());
    sb.append(delim);
sb.delete(sb.length() - delim.length(), sb.length());
return sb.toString();
Stringjoin(Collection items, String delimiter)
Joins items of the provided collection into a single String using the delimiter specified. 
if (items == null) {
    return null;
StringBuilder joinedValues = new StringBuilder();
Iterator<?> iterator = items.iterator();
if (iterator.hasNext()) {
    joinedValues.append(iterator.next().toString());
while (iterator.hasNext()) {
    joinedValues.append(delimiter);
    joinedValues.append(iterator.next().toString());
return joinedValues.toString();
Stringjoin(Collection iterable, String delimiter)
join 
return join(iterable, delimiter, null, null);
Stringjoin(Collection objects, String token, StringBuilder buf)
join 
for (Iterator<?> it = objects.iterator(); it.hasNext();) {
    buf.append(it.next()).append(token);
buf.delete(buf.lastIndexOf(token), buf.length()); 
return buf.toString();
Stringjoin(Collection objectsToJoin, String separator)
Joins all the strings in the list in a single one separated by the separator sequence. 
if ((objectsToJoin != null) && !objectsToJoin.isEmpty()) {
    StringBuilder builder = new StringBuilder();
    for (Object object : objectsToJoin) {
        builder.append(object);
        builder.append(separator);
    return builder.substring(0, builder.length() - separator.length());
} else {
...
Stringjoin(Collection objs, String delim)
join 
if (objs == null) {
    return "";
StringBuilder ret = new StringBuilder();
boolean needDelim = false;
for (Object obj : objs) {
    if (needDelim) {
        ret.append(delim);
...
Stringjoin(Collection objs, String delim)
join 
if (objs == null) {
    return "";
StringBuilder str = new StringBuilder();
boolean needDelim = false;
for (Object obj : objs) {
    if (needDelim) {
        str.append(delim);
...
Stringjoin(Collection objs, String delimiter)
Converts an array of objects to a delimited string representation. 
assert delimiter != null : "Delimiter should not be null";
if (objs == null || objs.size() == 0) {
    return "";
StringBuffer buffer = new StringBuffer();
for (Object obj : objs) {
    if (buffer.length() > 0) {
        buffer.append(delimiter);
...
Stringjoin(Collection objs, String sep)
Join a collection with a separator string 
StringBuilder sb = new StringBuilder();
boolean first = true;
for (Object obj : objs) {
    if (!first) {
        sb.append(sep);
    sb.append(obj.toString());
    first = false;
...