Java Utililty Methods List to Int List

Description

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

Method

List

toIntList(Set members)
to Int List

if (members == null || members.isEmpty()) {
    return null;
List<Integer> result = new ArrayList<Integer>();
Iterator<String> iterator = members.iterator();
while (iterator.hasNext()) {
    String str = iterator.next();
    Integer newsId = Integer.parseInt(str);
...

List

toIntList(String arr, String separator)
to Int List

String[] array = arr.split(separator);
List<Integer> r = new ArrayList<Integer>(array.length + 1);
for (int i = 0; i < array.length; i++) {
    r.add(Integer.parseInt(array[i]));
return r;

int[]

toInts(List list)
to Ints

int[] values = new int[list.size()];
int i = 0;
Iterator<Integer> iterator = list.iterator();
while (iterator.hasNext()) {
    Integer value = iterator.next();
    values[i++] = value;
return values;
...