Java Utililty Methods List Random Item

return myList.get(getRandomOffset(myList.size()));

return l.get((int) (Math.random() * l.size()));

int position = (int) (Math.random() * (list.size() - 1));
return list.get(position);

List<Integer> randomIdxList = new ArrayList<Integer>();
for (int i = minIdx; i <= maxIdx; i++)
    randomIdxList.add(i);
return randomIdxList;

int value = getRandomInt(max, false);
while (value < min || excludeList.contains(value)) {
    value = getRandomInt(max, false);
return value;

if (list.size() == 1) {
    return list.get(0);
if (list.size() > 1) {
    return list.get(R.nextInt(list.size()));
return null;

List<Integer> returnVal = new ArrayList<>();
Random random = new Random(27350);
while (returnVal.size() < size) {
    Integer currentVal = random.nextInt(maxOfRange);
    if (!returnVal.contains(currentVal)) {
        returnVal.add(currentVal);
return returnVal;

int[] values = makeRandomArray(arraySize, unique);
ArrayList<Integer> result = new ArrayList<Integer>();
for (int i = 0; i < values.length; i++) {
    result.add(values[i]);
return result;

if (size > 500) {
    return newRandomV2(size, price, oldRandomList);
Map<String, Integer> randomMap = new HashMap<String, Integer>();
int r = 10000000;
for (int i = 1; i <= price; i++) {
    randomMap.put(String.valueOf(r + i), new Integer(0));
for (int i = 0; i < oldRandomList.size(); i++) {
    randomMap.put(oldRandomList.get(i), new Integer(1));
List<String> ranList = new ArrayList<String>();
for (int j = 0; j < size; j++) {
    if (randomMap.size() > 0) {
        int range = randomMap.size() - oldRandomList.size() - j;
        if (range < 1) {
            range = 1;
        int ran = new Random().nextInt(range);
        int max = Math.min(ran + oldRandomList.size() + size, randomMap.size());
        String[] keys = new String[randomMap.size()];
        randomMap.keySet().toArray(keys);
        for (int k = 0, x = 0; k < max; k++) {
            String key = keys[k];
            Integer flag = randomMap.get(key);
            if (flag == 0) {
                if (x == ran) {
                    ranList.add(key);
                    randomMap.put(key, new Integer(1));
                    break;
                x++;
return ranList.toString().replaceAll("\\s+", "").replace("[", "").replace("]", "");

if (size < 0) {
    throw new IllegalArgumentException("Size cannot be less than 0. ");
Collection<Integer> integers = new ArrayList<Integer>(size);
for (int i = 0; i < size; i++) {
    integers.add(RANDOM.nextInt());
return integers;
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