Java Utililty Methods Collection Concatenate

final StringBuffer buffer = new StringBuffer();
if (objects != null) {
    for (Iterator<String> iterator = objects.iterator(); iterator.hasNext();) {
        buffer.append(iterator.next());
        buffer.append(separator);
return concatenate(objects, null, separator);
...

String ltlString = "";
for (String string : ltl) {
    if (!ltlString.equals(""))
        ltlString = ltlString.concat(" || " + string);
    else
        ltlString = ltlString.concat(string);
return ltlString;
...

String concatIds = "";
for (Object id : ids) {
    concatIds += "'" + id.toString() + "',";
return concatIds.substring(0, concatIds.length() - 1);

StringBuilder sb = new StringBuilder();
boolean first = true;
for (String ss : collection) {
    if (!first) {
        sb.append(", ");
    } else {
        first = false;
    sb.append(ss);
return sb.toString();

if (lastSep == null) {
    lastSep = sep;
int len = coll.size();
StringBuilder sb = new StringBuilder(16 + (len << 3));
Iterator<?> it = coll.iterator();
int i = 0;
while (it.hasNext()) {
...

int length = 0;
for (int[] tab : collection) {
    length += tab.length;
int[] toReturn = new int[length];
int offset = 0;
for (int[] tab : collection) {
    System.arraycopy(tab, 0, toReturn, offset, tab.length);
...

String cNames$ = "";
for (String name : cNames)
    cNames$ += name + split;
if (cNames$.length() > 0)
    cNames$ = cNames$.substring(0, cNames$.length() - 1);
return cNames$;

StringBuffer res = new StringBuffer();
for (Number key : keys) {
    res.append(key);
    res.append(',');
res.deleteCharAt(res.length() - 1);
return res.toString();

return concatStrings(strings.toArray(new String[strings.size()]));

StringBuffer concatedValues = new StringBuffer();
if (null == values) {
    return concatedValues.toString();
boolean first = true;
Iterator<String> valuesIter = values.iterator();
while (valuesIter.hasNext()) {
    if (!first) {
...