Java Utililty Methods List Join

try {
    args.addAll(0, command);
    return args;
} catch (Exception e) {
    ArrayList<String> commands = new ArrayList<String>(args.size() + command.size());
    commands.addAll(command);
    commands.addAll(args);
    return commands;
...

if (elements.isEmpty())
    return "[]";
StringBuilder ret = new StringBuilder();
for (String element : elements)
    ret.append(", ").append(element);
return "[" + ret.substring(2) + "]";

StringBuilder sb = new StringBuilder(items.size() << 3);
boolean first = true;
for (String item : items) {
    if (first) {
        first = false;
    } else {
        sb.append(separator);
    for (int i = 0; i < item.length(); i++) {
        char ch = item.charAt(i);
        if (ch == '\\' || ch == separator) {
            sb.append('\\');
        sb.append(ch);
return sb.toString();

StringBuilder sb = new StringBuilder();
boolean start = true;
for (String s : l) {
    if (start) {
        start = false;
    } else {
        sb.append(joiner);
    sb.append(s);
return sb.toString();

StringBuilder sb = new StringBuilder();
for (String string : lines) {
    sb.append(string);
    sb.append(delim);
return sb.toString();

return join(list, null);

return join(list, getDefaultSeparator());

String rtn;
if (list.isEmpty()) {
    rtn = "";
} else {
    StringBuilder sb = new StringBuilder();
    for (String string : list) {
        sb.append(string).append(",");
    rtn = sb.substring(0, sb.length() - 1);
return rtn;

if (list == null)
    return null;
StringBuilder joined = new StringBuilder();
boolean first = true;
for (String element : list) {
    if (first)
        first = false;
    else
...

return join(list, " ");