Java Utililty Methods Iterable

StringBuilder appendTo(StringBuilder appendable, Iterable parts, CharSequence separator)
append To

Iterator<?> iterator = parts.iterator();
if (iterator.hasNext()) {
 appendable.append(toString(iterator.next()));
 while (iterator.hasNext()) {
 appendable.append(separator);
 appendable.append(toString(iterator.next()));
return appendable;

void commafy(Iterable col, StringBuilder builder)
commafy

for (Iterator itr = col.iterator(); itr.hasNext();) {
 Object obj = itr.next();
 builder.append(obj.toString());
 if (itr.hasNext()) {
 builder.append(", ");

boolean containsSame(Iterable coll, Object obj)
contains Same

for (Iterator<?> iterator = coll.iterator(); iterator.hasNext();) {
 Object element = iterator.next();
 if (element == obj)
 return true;
return false;

Iterable> convertIterable(final Iterable> iterables)
convert Iterable

final List<Iterator<U>> iterators = new LinkedList<>();
for (Iterable<U> i : iterables) {
 iterators.add(i.iterator());
return iterators;

String createDelimitedString(Iterable iterable, String delimiter)
create Delimited String

Iterator iter = iterable.iterator();
String string = "";
while (iter.hasNext()) {
 string += iter.next();
 if (iter.hasNext())
 string += delimiter;
return string;
...

String createUpdateTemplate(String table, Iterable columns)
A static helper method for generating SQL templates for UPDATE statements for the provided column colection or array

StringBuilder builder = new StringBuilder();
builder.append("update ").append(table).append(" set ");
Iterator<String> it = columns.iterator();
while (it.hasNext()) {
 builder.append(it.next()).append(" = ?");
 if (it.hasNext())
 builder.append(", ");
return builder.append(" ").toString();

boolean equal(Iterable it1, Iterable it2)
equal

Iterator i1 = it1.iterator();
Iterator i2 = it2.iterator();
return equal(i1, i2);

boolean equalsIterablesInOrder(Iterable i1, Iterable i2)
Check if values in iterables are identical and in identical order If both are instanceof Collection, this method check sizes first Calls only once Itarable#iterator() for both iterables

if (i1 == i2) {
 return true;
if (i1 == null) {
 if (i2 == null) {
 return true;
 return false;
...

C fillFromIterable(C c, Iterable i)
Adds all of the items from a given Iterable into a Collection .

return fillFromIterator(c, i.iterator());

T getAny(Iterable iterable)
Returns one object from an Iterable or null if the iterable is empty.

Iterator<T> iterator = iterable.iterator();
if (!iterator.hasNext()) {
 return null;
return iterator.next();