Java Utililty Methods Collection to String

Iterator iter;
if (collection == null || (!(iter = collection.iterator()).hasNext())) {
    return "";
StringBuilder sb = new StringBuilder(matchLength(String.valueOf(iter.next()), "", fixedLength));
while (iter.hasNext()) {
    sb.append(separator).append(matchLength(String.valueOf(iter.next()), "", fixedLength));
return sb.toString();

String string = "";
for (Object object : objects) {
    string = string + object.toString() + ", ";
try {
    string = string.substring(0, string.length() - 2);
} catch (StringIndexOutOfBoundsException sioobe) {
    return "";
...

String errorSet = "[\n";
for (Object test : setOfTests) {
    errorSet += test + ", \n";
errorSet += "]";
return errorSet;

StringBuffer sb = new StringBuffer();
for (Iterator i = softwareTags.iterator(); i.hasNext();) {
    Object softwareTag = i.next();
    String tagName = null;
    sb.append(SPACE);
    if (tagName.indexOf(SPACE) != -1) {
        sb.append(QUOTE).append(tagName).append(QUOTE);
    } else {
...

StringBuilder sb = new StringBuilder();
if (collection != null) {
    Iterator<? extends Object> it = collection.iterator();
    while (it.hasNext()) {
        sb.append(it.next());
        if (it.hasNext()) {
            sb.append(", ");
return sb.toString();

StringBuilder sb = new StringBuilder();
for (Object line : collection) {
    sb.append(prefix);
    sb.append(line.toString());
    sb.append(suffix);
return sb.toString();

StringBuilder buffer = new StringBuilder();
Iterator it = c.iterator();
for (int i = 0; it.hasNext(); i++) {
    buffer.append(i).append(": ").append(it.next()).append('\n');
if (buffer.length() > 1) {
    buffer.setLength(buffer.length() - 1);
return buffer.toString();

if (c == null) {
    return STRING_NULL;
if (c.isEmpty()) {
    return STRING_LIST_EMPTY;
StringBuilder string = new StringBuilder(4 * c.size());
boolean sep = false;
...

if (collection == null || collection.isEmpty()) {
    return "";
StringBuilder stringBuilder = new StringBuilder("[");
for (Object object : collection) {
    if (object instanceof Collection<?>) {
        stringBuilder.append(toString((Collection<?>) object));
    } else {
...

if (isEmpty(collection)) {
    return "";
StringBuilder sb = new StringBuilder();
for (Object o : collection) {
    sb.append(o.toString()).append(", ");
sb.setLength(sb.length() - 2);
...