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(String joinString, List strings)
join 
StringBuilder sb = new StringBuilder();
for (int i = 0; i < strings.size(); ++i) {
    sb.append(strings.get(i));
    if (i + 1 < strings.size()) {
        sb.append(joinString);
return sb.toString();
...
Stringjoin(String joint, List elements)
Join all elements as a whole string, using 'joint' to separate each element 
StringBuilder sb = new StringBuilder();
for (String ele : elements) {
    if (sb.length() != 0)
        sb.append(joint);
    sb.append(ele);
return sb.toString();
Stringjoin(String sep, List a)
join 
return join(sep, a.toArray(new String[0]));
Stringjoin(String separator, Collection list)
join 
return join(separator, null, null, list);
Stringjoin(String separator, Collection inputList)
Join the strings contained in inputList with the separator. 
Iterator<String> itty = inputList.iterator();
return join(separator, itty);
Stringjoin(String separator, List items)
join 
return join(separator, items.toArray(new Object[items.size()]));
Stringjoin(String separator, List objs)
Join a list of Strings with a separator. 
if (objs == null) {
    throw new IllegalArgumentException("objs is null");
if (objs.isEmpty()) {
    return EMPTY_STRING;
Iterator<? extends Object> i = objs.iterator();
StringBuilder r = new StringBuilder(i.next().toString());
...
Stringjoin(String separator, List elements)
Returns a string containing all elements concatenated by a specified separator. 
if (elements == null || elements.size() == 0) {
    return ""; 
StringBuffer sb = new StringBuffer(elements.size() * 3);
int i = 0;
for (Object elem : elements) {
    if (i++ > 0) {
        sb.append(separator);
...
Stringjoin(String separator, List items)
Returns a string containing the string representation of each item in the given list, separated by the given separator. 
assert separator != null;
assert items != null;
StringBuilder sb = new StringBuilder();
boolean first = true;
for (Object item : items) {
    if (!first) {
        sb.append(separator);
    sb.append(item);
    first = false;
return sb.toString();
Stringjoin(String separator, List parts)
join 
StringBuilder stringBuilder = new StringBuilder();
Iterator<String> iterator = parts.iterator();
while (iterator.hasNext()) {
    stringBuilder.append(iterator.next());
    if (iterator.hasNext())
        stringBuilder.append(separator);
return stringBuilder.toString();
...