RandomGenerator
org.apache.commons.math3.random

Interface RandomGenerator

    • Method Summary

      Methods 
      Modifier and TypeMethod and Description
      booleannextBoolean()
      Returns the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence.
      voidnextBytes(byte[] bytes)
      Generates random bytes and places them into a user-supplied byte array.
      doublenextDouble()
      Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.
      floatnextFloat()
      Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.
      doublenextGaussian()
      Returns the next pseudorandom, Gaussian ("normally") distributed double value with mean 0.0 and standard deviation 1.0 from this random number generator's sequence.
      intnextInt()
      Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.
      intnextInt(int n)
      Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.
      longnextLong()
      Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence.
      voidsetSeed(int seed)
      Sets the seed of the underlying random number generator using an int seed.
      voidsetSeed(int[] seed)
      Sets the seed of the underlying random number generator using an int array seed.
      voidsetSeed(long seed)
      Sets the seed of the underlying random number generator using a long seed.
    • Method Detail

      • setSeed

        void setSeed(int seed)
        Sets the seed of the underlying random number generator using an int seed.

        Sequences of values generated starting with the same seeds should be identical.

        Parameters:
        seed - the seed value
      • setSeed

        void setSeed(int[] seed)
        Sets the seed of the underlying random number generator using an int array seed.

        Sequences of values generated starting with the same seeds should be identical.

        Parameters:
        seed - the seed value
      • setSeed

        void setSeed(long seed)
        Sets the seed of the underlying random number generator using a long seed.

        Sequences of values generated starting with the same seeds should be identical.

        Parameters:
        seed - the seed value
      • nextBytes

        void nextBytes(byte[] bytes)
        Generates random bytes and places them into a user-supplied byte array. The number of random bytes produced is equal to the length of the byte array.
        Parameters:
        bytes - the non-null byte array in which to put the random bytes
      • nextInt

        int nextInt()
        Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence. All 232 possible int values should be produced with (approximately) equal probability.
        Returns:
        the next pseudorandom, uniformly distributed int value from this random number generator's sequence
      • nextInt

        int nextInt(int n)
        Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.
        Parameters:
        n - the bound on the random number to be returned. Must be positive.
        Returns:
        a pseudorandom, uniformly distributed int value between 0 (inclusive) and n (exclusive).
        Throws:
        IllegalArgumentException - if n is not positive.
      • nextLong

        long nextLong()
        Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence. All 264 possible long values should be produced with (approximately) equal probability.
        Returns:
        the next pseudorandom, uniformly distributed longvalue from this random number generator's sequence
      • nextBoolean

        boolean nextBoolean()
        Returns the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence.
        Returns:
        the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence
      • nextFloat

        float nextFloat()
        Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.
        Returns:
        the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence
      • nextDouble

        double nextDouble()
        Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.
        Returns:
        the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence
      • nextGaussian

        double nextGaussian()
        Returns the next pseudorandom, Gaussian ("normally") distributed double value with mean 0.0 and standard deviation 1.0 from this random number generator's sequence.
        Returns:
        the next pseudorandom, Gaussian ("normally") distributed double value with mean 0.0 and standard deviation 1.0 from this random number generator's sequence

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