Android Utililty Methods List Join

if (list.isEmpty())
    return "";
StringBuilder b = new StringBuilder();
for (String item : list) {
    if (!ignoreNull || item != null) {
        b.append(separator).append(item);
if (b.length() == 0) {
    return "";
return b.toString().substring(separator.length());

StringBuilder builder = new StringBuilder();
for (int i = 0; i < list.size(); i++) {
    builder.append(list.get(i));
    if (i < list.size() - 1) {
        builder.append(separator);
return builder.toString();
...

StringBuilder sb = new StringBuilder();
if (strList != null && !strList.isEmpty()) {
    boolean isFirst = true;
    for (String str : strList) {
        if (isFirst) {
            isFirst = false;
        } else {
            sb.append(separator);
...

return join(list, separator, false);

return join(list.toArray(new String[0]), glue);

if (s == null || s.isEmpty()) {
    return "";
Iterator<String> iter = s.iterator();
StringBuilder builder = new StringBuilder(iter.next());
while (iter.hasNext()) {
    builder.append(delimiter).append(iter.next());
return builder.toString();

StringBuilder stringBuilder = new StringBuilder();
if (strings == null)
    return "";
for (int i = 0; i < strings.size(); i++) {
    stringBuilder.append(strings.get(i));
    if (i != strings.size() - 1) {
        stringBuilder.append(glue);
return stringBuilder.toString();

StringBuilder result = new StringBuilder();
for (Object text : texts) {
    result.append(text);
    result.append(separator);
return result.toString();

StringBuilder sb = new StringBuilder();
for (String item : data) {
    if (sb.length() > 0)
        sb.append(separator);
    sb.append(item);
return sb.toString();

StringBuilder out = new StringBuilder();
for (int i = 0; i < elements.size(); i++) {
    String element = elements.get(i);
    if (i > 0) {
        out.append(delimiter);
    out.append(element);
return out.toString();