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

StringjoinStrings(Iterable list)
same as #joinStrings(Iterable,String) , and default sep to empty string 
return joinStrings(list, "");
StringjoinStrings(List aList, String aString)
Returns a string by concatenating strings in given list separated by given string. 
StringBuffer sb = new StringBuffer();
for (int i = 0, iMax = aList.size(); i < iMax; i++)
    sb.append(i == 0 ? "" : aString).append(aList.get(i));
return sb.toString();
StringjoinStrings(List list, String delim)
This method takes a List and a delimiter and joins the strings into a single string, where the original strings are separated using the given delimiter. 
if (list == null)
    return null;
StringBuilder builder = new StringBuilder(list.get(0));
for (String s : list.subList(1, list.size())) {
    builder.append(delim).append(s);
return builder.toString();
StringjoinStrings(List strings, String separator)
Join an arraylist of strings into a single string using a separator 
if (strings == null) {
    return null;
String res = ""; 
for (int i = 0; i < strings.size(); i++) {
    res += (i > 0) ? separator : ""; 
    res += strings.get(i);
return res;
StringjoinStrings(List strings, String separator)
Join the strings in strings together in sequence with separator between them. 
if (strings == null || separator == null) {
    throw new NullPointerException();
if (strings.isEmpty()) {
    return "";
StringBuilder builder = new StringBuilder(strings.get(0));
for (String element : strings.subList(1, strings.size())) {
...
StringjoinStrings(String delim, List strings)
join Strings 
StringBuilder sb = new StringBuilder();
for (int i = 0; i < strings.size(); ++i) {
    sb.append(strings.get(i).toString());
    if (i < strings.size() - 1) {
        sb.append(delim);
return sb.toString();
...
StringjoinStrings(String joiner, List objects)
join Strings 
return joinStrings(joiner, objects, false);
StringjoinTextWithCommas(List list)
join Text With Commas 
StringBuffer buf = new StringBuffer();
if (list.size() > 0) {
    Iterator<String> iterator = list.iterator();
    for (int i = 0; iterator.hasNext(); i++) {
        String field = iterator.next();
        buf.append(field);
        if (i < list.size())
            buf.append(", ");
...
booleanjoinThreads(List threads)
join Threads 
boolean interrupted = false;
for (Thread curThread : threads) {
    try {
        curThread.join();
    } catch (InterruptedException e) {
        e.printStackTrace();
        interrupted = true;
        break;
...
StringBufferjoinTokens(final List tokens)
Crudely join tokens together. 
final StringBuffer sb = new StringBuffer();
for (final String token : tokens) {
    sb.append(token);
    sb.append(" ");
return sb;