Java Utililty Methods List to Int List

List of utility methods to do List to Int List

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Description

The list of methods to do List to Int List are organized into topic(s).

Method

int[]toIntArray(List list)
Converts the argument to an int[] array. 
final int[] array = new int[list.size()];
for (int i = 0; i < array.length; i++)
    array[i] = ((Integer) list.get(i)).intValue();
return array;
int[]toIntArray(List nums)
Convert a List of Number objects to an int array. 
int[] result = new int[nums.size()];
Iterator iter;
int i;
for (i = 0, iter = nums.iterator(); iter.hasNext(); i++) {
    Number num = (Number) iter.next();
    result[i] = num.intValue();
return result;
...
int[]toIntArray(List ints)
to Int Array 
int[] result = new int[ints.size()];
int i = 0;
for (Number j : ints) {
    result[i] = j.intValue();
    i++;
return result;
ArrayListtoIntArray(List bytes)
Coverts a data stream represented as an array of bytes to an array of integers. 
if (bytes.size() % 4 != 0) {
    throw new IllegalArgumentException(
            "Integer Array can only be created from byte arrays where size%4 is 0");
ArrayList<Integer> integers = new ArrayList<Integer>();
for (int index = 0; index < bytes.size(); index += 4) {
    integers.add(
            new Integer(((bytes.get(index) << 24) & 0xff000000) | ((bytes.get(index + 1) << 16) & 0xff0000)
...
int[]toIntArray(List a)
to Int Array 
int[] d = new int[a.size()];
for (int i = 0; i < d.length; ++i) {
    d[i] = a.get(i);
return d;
int[]toIntArray(List integerList)
to Int Array 
if (integerList == null)
    return null;
int[] intArray = new int[integerList.size()];
for (int i = 0; i < integerList.size(); i++) {
    intArray[i] = integerList.get(i);
return intArray;
int[]toIntArray(List intList)
Convert a List into the primitive type array 
assert intList != null;
if (intList == null) {
    return null;
int[] ints = new int[intList.size()];
for (int i = 0; i < intList.size(); i++) {
    ints[i] = intList.get(i);
return ints;
int[]toIntArray(List list)
to Int Array 
int[] array = new int[list.size()];
for (int i = 0; i < array.length; i++)
    array[i] = list.get(i);
return array;
int[]toIntArray(List list)
Converts a List with Integer objects to a primary type int array 
if (list == null)
    return null;
int[] arr = new int[list.size()];
int i = 0;
for (Integer v : list)
    arr[i++] = v;
return arr;
int[]toIntArray(List list)
to Int Array 
int[] array = new int[list.size()];
Iterator<Integer> ints = list.iterator();
int idx = 0;
while (ints.hasNext()) {
    Integer value = ints.next();
    array[idx++] = value.intValue();
return array;
...