Package org.apache.commons.math3.random

Class ISAACRandom

java.lang.Object
org.apache.commons.math3.random.BitsStreamGenerator
org.apache.commons.math3.random.ISAACRandom
All Implemented Interfaces:
Serializable, RandomGenerator
public class ISAACRandom extends BitsStreamGenerator implements Serializable
ISAAC: a fast cryptographic pseudo-random number generator
ISAAC (Indirection, Shift, Accumulate, Add, and Count) generates 32-bit random numbers. ISAAC has been designed to be cryptographically secure and is inspired by RC4. Cycles are guaranteed to be at least 240 values long, and they are 28295 values long on average. The results are uniformly distributed, unbiased, and unpredictable unless you know the seed.
This code is based (with minor changes and improvements) on the original implementation of the algorithm by Bob Jenkins.
Since:
3.0
See Also:

  • Constructor Details

    • ISAACRandom

      public ISAACRandom()
      Creates a new ISAAC random number generator.
      The instance is initialized using a combination of the current time and system hash code of the instance as the seed.

    • ISAACRandom

      public ISAACRandom(long seed)
      Creates a new ISAAC random number generator using a single long seed.
      Parameters:
      seed - Initial seed.

    • ISAACRandom

      public ISAACRandom(int[] seed)
      Creates a new ISAAC random number generator using an int array seed.
      Parameters:
      seed - Initial seed. If null, the seed will be related to the current time.

  • Method Details