This class provides methods that generates pseudo-random numbers of different types, such as int, long, double and float using either

Collection is the root of the collection hierarchy.

An Iterator is used to sequence over a collection of objects.

List is a collection which maintains an ordering for its elements.

An ListIterator is used to sequence over a List of objects.

Map has a set of keys, each key is mapped to a single value.

Map.Entry is a key/value mapping which is contained in a Map.

Set is a collection which does not allow duplicate elements.