Java Utililty Methods List to String

if (input.isEmpty())
    return "";
String result = input.get(0);
for (int i = 1; i < input.size(); i++) {
    result += sep + input.get(i);
return result;

return toString(list.toArray(new String[list.size()]));

String result = "";
for (int i = 0; i < list.size(); i++) {
    if (list.size() == 2 && i == 1) {
        result += " and ";
    } else if (list.size() > 2 && i == list.size() - 1) {
        result += ", and ";
    } else if (i != 0) {
        result += ", ";
...

String argumentString = "";
Iterator<String> iterator2 = list.iterator();
for (int i = 0; iterator2.hasNext(); i++) {
    String argument = iterator2.next();
    if (i > 0)
        argumentString += delimiter;
    argumentString += argument;
return argumentString;

StringBuffer sbuf = new StringBuffer();
for (int i = 0; i < list.size(); i++) {
    if (i > 0) {
        sbuf.append(split);
    sbuf.append(list.get(i));
return sbuf.toString();
...

final String SEPARATOR = ",";
final StringBuilder stringBuilder = new StringBuilder();
for (final String string : strings) {
    if (stringBuilder.length() != 0) {
        stringBuilder.append(SEPARATOR).append(' ');
    stringBuilder.append(string);
return stringBuilder.toString();

if (strings.isEmpty()) {
    return null;
StringBuilder builder = new StringBuilder();
Iterator<String> iterator = strings.iterator();
while (iterator.hasNext()) {
    builder.append(iterator.next());
    if (iterator.hasNext()) {
...

return list == null ? "null" : Arrays.toString(list.toArray());

StringBuilder buf = new StringBuilder();
int k = -1;
for (T t : list) {
    if (++k > 0) {
        buf.append(", ");
    buf.append(t);
return buf.toString();

StringBuilder stringBuilder = new StringBuilder();
if (list.size() == 1) {
    stringBuilder.append(list.get(0));
} else if (list.size() == 2) {
    stringBuilder.append(list.get(0) + " and " + list.get(1));
} else if (list.size() > 0) {
    stringBuilder.append(list.get(0));
    for (int i = 1; i < list.size() - 1; i++) {
...