Java Utililty Methods Collection to Array

Object[] array = new Object[c.size()];
int i = 0;
for (Iterator it = c.iterator(); it.hasNext();) {
    array[i++] = it.next();
return array;

return asList(collection).toArray(a);

boolean[] array = new boolean[collection.size()];
Iterator<Boolean> iterator = collection.iterator();
int i = 0;
while (iterator.hasNext()) {
    array[i++] = iterator.next();
return array;

final long[] d = new long[ls.size()];
int i = 0;
for (final Number num : ls)
    d[i++] = num.longValue();
return d;

int i = 0, n = (c == null) ? 0 : c.size();
long[] ans = new long[n];
if (n > 0)
    for (Number nr : c)
        ans[i++] = nr.longValue();
return ans;

Object[] objs = null;
if (isNotEmpty(collection)) {
    objs = new Object[collection.size()];
    collection.toArray(objs);
return objs;

int[] toReturn = new int[c.size()];
Iterator<Integer> it = c.iterator();
for (int i = 0; i < toReturn.length; i++) {
    toReturn[i] = it.next().intValue();
return toReturn;

final int[] ret = new int[numbers.size()];
int i = 0;
for (Number n : numbers) {
    ret[i++] = n.intValue();
return ret;

if (c == null)
    return new Object[0];
return c.toArray(new Object[c.size()]);

final StringBuilder ret = new StringBuilder();
if (!_list.isEmpty()) {
    boolean first = true;
    ret.append("[");
    for (final CharSequence entry : _list) {
        if (first) {
            first = false;
        } else {
...