Java Utililty Methods ArrayList Join

StringBuffer result = new StringBuffer();
if (array != null && array.size() > 0) {
    for (String str : array) {
        result.append(str);
        result.append(separator);
    result.delete(result.length() - 1, result.length());
return result.toString();

StringBuffer buf = new StringBuffer();
for (int i = 0; i < arry.size(); i++) {
    if (buf.length() > 0) {
        buf.append(with);
    buf.append(arry.get(i));
return buf.toString();
...

final int size = parts.size();
int destSize = size - 1;
for (int i = 0; i < size; ++i) {
    destSize += parts.get(i).length();
final StringBuilder buf = new StringBuilder(destSize);
int i = 0;
for (final int n = size - 1; i < n; ++i) {
...

String answer = "";
String join = "";
for (int i = 0; i < a.size(); i++) {
    String s = (String) a.get(i);
    answer += join + s;
    join = glue;
return answer;
...

if (coll.isEmpty()) {
    return "";
StringBuilder sb = new StringBuilder();
for (String x : coll) {
    sb.append(x).append(delimiter);
sb.delete(sb.length() - delimiter.length(), sb.length());
...

String result = "";
for (int i = 0; i < array.size(); i++) {
    result += array.get(i);
    if (i < array.size() - 1) {
        result += joiner;
return result;
...

String sCmdl = "";
if (lsCmdl != null)
    for (int i = 0; i < lsCmdl.size(); i++)
        if (lsCmdl.get(i) != null && lsCmdl.get(i).length() > 0) {
            if (i > 0)
                sCmdl += " ";
            sCmdl += lsCmdl.get(i);
return sCmdl;

StringBuilder joinedList = new StringBuilder();
for (String item : list) {
    joinedList.append(item);
    joinedList.append(joint);
if (joinedList.length() > 0)
    joinedList.setLength(joinedList.length() - 1);
return joinedList.toString();
...