Java Utililty Methods List to String

ArrayList<String> toRet = new ArrayList<String>();
for (Object o : list)
    toRet.add(o.getClass().getSimpleName());
return toRet;

if (list == null) {
    return "null";
final StringBuffer result = new StringBuffer();
final Iterator<?> iterator = list.iterator();
if (iterator.hasNext()) {
    result.append(iterator.next());
while (iterator.hasNext()) {
    result.append(delimiter);
    result.append(iterator.next());
return result.toString();

if (itemMapList != null && itemMapList.size() > 0) { 
    Iterator<Map<String, Object>> iterator = itemMapList.iterator();
    while (iterator.hasNext()) {
        Map<String, Object> next = iterator.next();
        boolean containsValue = next.containsValue(subjectName);
        if (containsValue) {
            return Integer.parseInt(next.get("itemID") + "");
return 0;

if (strings != null) {
    final StringBuilder sb = new StringBuilder();
    for (String string : strings) {
        sb.append(separator);
        sb.append(string);
    if (sb.length() > 0) {
        sb.delete(0, separator.length());
...

List<String> list = new ArrayList<String>(array.length);
for (int i = 0; i < array.length; i++) {
    list.add(String.valueOf(array[i]));
return list;

List<String> list = new ArrayList<String>(array.length);
for (int i = 0; i < array.length; i++) {
    list.add(array[i].toString());
return list;

return tags != null ? Arrays.asList(tags.split("\\s*,\\s*")) : null;

if ((V == null) || (V.size() == 0)) {
    return "";
final StringBuffer s = new StringBuffer("");
for (final Iterator i = V.iterator(); i.hasNext();)
    s.append(", " + i.next().toString());
if (s.length() == 0)
    return "";
...

List<String> stringList = new ArrayList<>();
if (list != null) {
    for (Object object : list)
        stringList.add(object != null ? object.toString() : null);
return stringList;