Class XORShiftRNG

  • All Implemented Interfaces:
    Serializable, RepeatableRNG

    public class XORShiftRNG
    extends Random
    implements RepeatableRNG

    Very fast pseudo random number generator. See this page for a description. This RNG has a period of about 2^160, which is not as long as the MersenneTwisterRNG but it is faster.

    NOTE: Because instances of this class require 160-bit seeds, it is not possible to seed this RNG using the Random.setSeed(long) method inherited from Random. Calls to this method will have no effect. Instead the seed must be set by a constructor.

    Since:
    1.2
    See Also:
    Serialized Form
    • Constructor Detail

      • XORShiftRNG

        public XORShiftRNG()
        Creates a new RNG and seeds it using the default seeding strategy.
      • XORShiftRNG

        public XORShiftRNG​(SeedGenerator seedGenerator)
                    throws SeedException
        Seed the RNG using the provided seed generation strategy.
        Parameters:
        seedGenerator - The seed generation strategy that will provide the seed value for this RNG.
        Throws:
        SeedException - If there is a problem generating a seed.
      • XORShiftRNG

        public XORShiftRNG​(byte[] seed)
        Creates an RNG and seeds it with the specified seed data.
        Parameters:
        seed - The seed data used to initialise the RNG.
    • Method Detail

      • getSeed

        public byte[] getSeed()
        Specified by:
        getSeed in interface RepeatableRNG
        Returns:
        The seed data used to initialise this pseudo-random number generator.
      • next

        protected int next​(int bits)
        Overrides:
        next in class Random