Java Utililty Methods List to Int List

if (list == null || list.size() == 0)
    return null;
StringBuffer buf = new StringBuffer();
for (int i = 0; i < list.size(); i++) {
    Object obj = list.get(i);
    if (obj != null && obj.toString().length() != 0) {
        if (i != 0)
            buf.append(", ");
...

final int[] result = new int[ints.size()];
for (int i = 0; i < result.length; i++) {
    result[i] = ints.get(i);
return result;

int[] foo = new int[l.size()];
int count = 0;
Iterator iter = l.iterator();
while (iter.hasNext()) {
    foo[count++] = ((Integer) iter.next()).intValue();
return foo;

int[] newArray = new int[list.size()];
for (int i = 0; i < list.size(); i++) {
    newArray[i] = list.get(i).intValue();
return newArray;

Integer[][][] str = new Integer[list.size()][][];
ArrayList a, b;
for (int i = 0; i < list.size(); i++) {
    a = (ArrayList) list.get(i);
    str[i] = new Integer[a.size()][];
    for (int m = 0; m < a.size(); m++) {
        b = (ArrayList) a.get(m);
        str[i][m] = new Integer[b.size()];
...

final int[] ints = new int[numbers.size()];
for (int i = 0; i < ints.length; i++) {
    final Number number = numbers.get(i);
    ints[i] = number.intValue();
return ints;

return toIntArray(list, -1);

int[] array = new int[list.size()];
for (int i = 0; i < list.size(); i++) {
    array[i] = list.get(i);
return array;

int[] ret = new int[list.size()];
int pos = 0;
for (Integer it : list) {
    ret[pos] = it.intValue();
    ++pos;
return ret;

int[] ret = new int[list.size()];
int i = 0;
for (Integer e : list)
    ret[i++] = e.intValue();
return ret;