Java Utililty Methods Collection to String

List of utility methods to do Collection to String

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Description

The list of methods to do Collection to String are organized into topic(s).

Method

StringtoString(Collection collection)
to String 
StringBuilder sb = new StringBuilder(collection.size() * 2);
for (Object item : collection) {
    sb.append(item).append(",");
return sb.toString();
StringtoString(Collection collection, String separator)
Flattens a collection elements to a string calling toString() on each element. 
String toString = "L[null]";
if (collection != null) {
    StringBuilder sb = new StringBuilder(collection.size() * 20);
    String sep = "";
    for (Object obj : collection) {
        sb.append(sep).append(obj);
        sep = separator;
    toString = sb.toString();
return toString;
StringtoString(Collection elements, String separator)
to String 
final int size = elements.size() - 1;
if (size >= 0) {
    final StringBuilder builder = new StringBuilder();
    final Iterator<?> iterator = elements.iterator();
    for (int i = 0; i < size; i++) {
        builder.append(iterator.next());
        builder.append(separator);
    return builder.append(iterator.next()).toString();
return "";
StringtoString(Collection itemList)
to String 
return printf("[%s]", join(itemList, ", ", "\"%s\""));
StringtoString(Collection objects, CharSequence delimiter)
to String 
StringBuilder sb = new StringBuilder();
for (Object o : objects) {
    sb.append(o.toString());
    sb.append(delimiter);
sb.setLength(sb.length() - delimiter.length());
return sb.toString();
voidtoString(Collection bytes, Collection result)
to String 
for (byte[] bs : bytes) {
    result.add(toString(bs));
StringtoString(Collection collection)
to String 
if (collection == null) {
    return "";
StringBuilder builder = new StringBuilder();
for (Object item : collection) {
    if (item == null) {
        continue;
    builder.append(String.valueOf(item));
return builder.toString();
StringtoString(Collection strings)
Convert a Collection of strings to a line separated list of strings. 
String string = "";
for (Iterator<String> itr = strings.iterator(); itr.hasNext();) {
    string += itr.next() + "\n";
return string;
StringtoString(Collection a, String begStr, String sepStr, String endStr)
to String 
int n = a.size();
if (n == 0)
    return begStr + endStr;
Iterator<T> it = a.iterator();
String s = begStr + it.next();
while (it.hasNext())
    s += sepStr + it.next();
return s + endStr;
...
StringtoString(Collection collection)
to String 
StringBuilder sb = new StringBuilder();
if (collection.size() == 0) {
    return "";
for (T object : collection) {
    sb.append(object.toString());
    sb.append(",");
return sb.substring(0, sb.length() - 1);