Java Utililty Methods Random Element

List of utility methods to do Random Element

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Description

The list of methods to do Random Element are organized into topic(s).

Method

TrandomEle(List list)
random Ele 
return randomEle(list, list.size());
ByterandomElem(Random rand, Set partitions)
random Elem 
int item = rand.nextInt(partitions.size());
int i = 0;
for (Byte obj : partitions) {
    if (i == item)
        return obj;
    i = i + 1;
return partitions.iterator().next();
...
ErandomElement(Collection coll)
random Element 
return randomElement(coll, new Random());
ErandomElement(E[] array)
random Element 
return array[randomPositiveInt() % array.length];
ErandomElement(final Set set)
random Element 
final int size = set.size();
final int index = RANDOM_GENERATOR.nextInt(size);
int i = 0;
for (final E element : set) {
    if (i == index) {
        return element;
    i++;
...
intrandomElement(int[] anArray)
random Element 
if (anArray.length == 0) {
    return 0;
return anArray[nextInt(anArray.length)];
TrandomElement(List list)
Selects a random element from a list. 
if (list.isEmpty())
    throw new IllegalArgumentException("Can't select random element from an empty list.");
return list.get(random.get().nextInt(list.size()));
TrandomElement(T... values)
random Element 
if (values.length == 0)
    throw new IllegalArgumentException("Cannot choose random value from an empty array");
return values[random.nextInt(values.length)];
TrandomElement(T[] array)
Picks a random element out of any array type. 
return array[(int) (RANDOM.nextDouble() * array.length)];
TrandomElementOf(final List list)
Get a random element from the list. 
if (list.isEmpty()) {
    return null;
return list.get(nextInt(0, list.size()));