| Package | Description |
|---|---|
| java.math |
Provides classes for performing arbitrary-precision integer
arithmetic (
BigInteger) and arbitrary-precision decimal
arithmetic (BigDecimal). |
| java.security |
Provides the classes and interfaces for the security framework.
|
| java.util |
Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array).
|
| java.util.concurrent |
Utility classes commonly useful in concurrent programming.
|
| Modifier and Type | Method and Description |
|---|---|
static BigInteger |
BigInteger.probablePrime(int bitLength,
Random rnd)
Returns a positive BigInteger that is probably prime, with the
specified bitLength.
|
| Constructor and Description |
|---|
BigInteger(int bitLength,
int certainty,
Random rnd)
Constructs a randomly generated positive BigInteger that is probably
prime, with the specified bitLength.
|
BigInteger(int numBits,
Random rnd)
Constructs a randomly generated BigInteger, uniformly distributed over
the range 0 to (2
numBits - 1), inclusive. |
| Modifier and Type | Class and Description |
|---|---|
class |
SecureRandom
This class provides a cryptographically strong random number
generator (RNG).
|
| Modifier and Type | Method and Description |
|---|---|
static void |
Collections.shuffle(List<?> list,
Random rnd)
Randomly permute the specified list using the specified source of
randomness.
|
| Modifier and Type | Class and Description |
|---|---|
class |
ThreadLocalRandom
A random number generator isolated to the current thread.
|
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