org.apache.commons.math3.random

## Class SynchronizedRandomGenerator

- java.lang.Object
- - org.apache.commons.math3.random.SynchronizedRandomGenerator

- All Implemented Interfaces:
    RandomGenerator

      public class SynchronizedRandomGenerator
      extends Object
      implements RandomGenerator

  Any `RandomGenerator` implementation can be thread-safe if it is used through an instance of this class. This is achieved by enclosing calls to the methods of the actual generator inside the overridden `synchronized` methods of this class.
  Since:
    3.1

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `SynchronizedRandomGenerator(RandomGenerator rng)` Creates a synchronized wrapper for the given `RandomGenerator` instance.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `nextBoolean()` Returns the next pseudorandom, uniformly distributed `boolean` value from this random number generator's sequence.
    `void` | `nextBytes(byte[] bytes)` Generates random bytes and places them into a user-supplied byte array.
    `double` | `nextDouble()` Returns the next pseudorandom, uniformly distributed `double` value between `0.0` and `1.0` from this random number generator's sequence.
    `float` | `nextFloat()` Returns the next pseudorandom, uniformly distributed `float` value between `0.0` and `1.0` from this random number generator's sequence.
    `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.
    `int` | `nextInt()` Returns the next pseudorandom, uniformly distributed `int` value from this random number generator's sequence.
    `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.
    `long` | `nextLong()` Returns the next pseudorandom, uniformly distributed `long` value from this random number generator's sequence.
    `void` | `setSeed(int seed)` Sets the seed of the underlying random number generator using an `int` seed.
    `void` | `setSeed(int[] seed)` Sets the seed of the underlying random number generator using an `int` array seed.
    `void` | `setSeed(long seed)` Sets the seed of the underlying random number generator using a `long` seed.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### SynchronizedRandomGenerator

          public SynchronizedRandomGenerator(RandomGenerator rng)

      Creates a synchronized wrapper for the given `RandomGenerator` instance.
      Parameters:
        `rng` - Generator whose methods will be called through their corresponding overridden synchronized version. To ensure thread-safety, the wrapped generator must not be used directly.

  - ### Method Detail

    - #### setSeed

          public 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.

      Specified by:
        `setSeed` in interface `RandomGenerator`
      Parameters:
        `seed` - the seed value

    - #### setSeed

          public 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.

      Specified by:
        `setSeed` in interface `RandomGenerator`
      Parameters:
        `seed` - the seed value

    - #### setSeed

          public 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.

      Specified by:
        `setSeed` in interface `RandomGenerator`
      Parameters:
        `seed` - the seed value

    - #### nextBytes

          public 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.
      Specified by:
        `nextBytes` in interface `RandomGenerator`
      Parameters:
        `bytes` - the non-null byte array in which to put the random bytes

    - #### nextInt

          public 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.
      Specified by:
        `nextInt` in interface `RandomGenerator`
      Returns:
        the next pseudorandom, uniformly distributed `int` value from this random number generator's sequence

    - #### nextInt

          public 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.
      Specified by:
        `nextInt` in interface `RandomGenerator`
      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).

    - #### nextLong

          public 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.
      Specified by:
        `nextLong` in interface `RandomGenerator`
      Returns:
        the next pseudorandom, uniformly distributed `long` value from this random number generator's sequence

    - #### nextBoolean

          public boolean nextBoolean()

      Returns the next pseudorandom, uniformly distributed `boolean` value from this random number generator's sequence.
      Specified by:
        `nextBoolean` in interface `RandomGenerator`
      Returns:
        the next pseudorandom, uniformly distributed `boolean` value from this random number generator's sequence

    - #### nextFloat

          public float nextFloat()

      Returns the next pseudorandom, uniformly distributed `float` value between `0.0` and `1.0` from this random number generator's sequence.
      Specified by:
        `nextFloat` in interface `RandomGenerator`
      Returns:
        the next pseudorandom, uniformly distributed `float` value between `0.0` and `1.0` from this random number generator's sequence

    - #### nextDouble

          public double nextDouble()

      Returns the next pseudorandom, uniformly distributed `double` value between `0.0` and `1.0` from this random number generator's sequence.
      Specified by:
        `nextDouble` in interface `RandomGenerator`
      Returns:
        the next pseudorandom, uniformly distributed `double` value between `0.0` and `1.0` from this random number generator's sequence

    - #### nextGaussian

          public 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.
      Specified by:
        `nextGaussian` in interface `RandomGenerator`
      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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