Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.apache.commons.math.random
Interface RandomGenerator

All Known Implementing Classes:
  AbstractRandomGenerator, BitsStreamGenerator, JDKRandomGenerator, MersenneTwister, RandomAdaptor

    public interface RandomGenerator

Interface extracted from `java.util.Random`. This interface is implemented by `AbstractRandomGenerator`.

Since:
  1.1
Version:
  $Revision: 811685 $ $Date: 2009-09-05 13:36:48 -0400 (Sat, 05 Sep 2009) $

Method Summary
`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 underyling random number generator using an `int` seed.
`void` | `setSeed(int[] seed)` Sets the seed of the underyling random number generator using an `int` array seed.
`void` | `setSeed(long seed)` Sets the seed of the underyling random number generator using a `long` seed.

Method Detail

### setSeed

    void setSeed(int seed)

  Sets the seed of the underyling 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 underyling 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 underyling 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:
    `java.lang.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 `long` value 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

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Copyright (c) 2003-2011 Apache Software Foundation