weka.core

## Class Debug.Random

- java.lang.Object
- - java.util.Random
  - - weka.core.Debug.Random

- All Implemented Interfaces:
    java.io.Serializable, RevisionHandler
  Enclosing class:
    Debug

      public static class Debug.Random
      extends java.util.Random
      implements java.io.Serializable, RevisionHandler

  This extended Random class enables one to print the generated random numbers etc., before they are returned. It can either use stdout (default) for outputting the logging information or a Log object (level is then INFO).
  Version:
    $Revision: 8034 $
  Author:
    FracPete (fracpete at waikato dot ac dot nz)
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `Random()` Creates a new random number generator.
    `Random(boolean debug)` Creates a new random number generator.
    `Random(long seed)` Creates a new random number generator using a single long seed.
    `Random(long seed, boolean debug)` Creates a new random number generator using a single long seed.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `getDebug()` returns whether to print the generated random values or not
    `long` | `getID()` returns the unique ID of this number generator
    `Debug.Log` | `getLog()` the currently used log, if null then stdout is used for outputting the debugging information
    `java.lang.String` | `getRevision()` Returns the revision string.
    `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` | `printStackTrace()` prints the current stacktrace
    `void` | `setDebug(boolean value)` sets whether to print the generated random values or not
    `void` | `setLog(Debug.Log value)` the log to use, if it is null then stdout is used
    `void` | `setSeed(long seed)` Sets the seed of this random number generator using a single long seed.
    `java.lang.String` | `toString()` returns a string representation of this number generator

    - ### Methods inherited from class java.util.Random

      `doubles, doubles, doubles, doubles, ints, ints, ints, ints, longs, longs, longs, longs`

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

      `equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### Random

          public Random()

      Creates a new random number generator. With no debugging.

    - #### Random

          public Random(long seed)

      Creates a new random number generator using a single long seed. With no debugging
      Parameters:
        `seed` - the seed value

    - #### Random

          public Random(boolean debug)

      Creates a new random number generator. With optional debugging.
      Parameters:
        `debug` - if true, debugging output is enabled

    - #### Random

          public Random(long seed,
                        boolean debug)

      Creates a new random number generator using a single long seed. With optional debugging
      Parameters:
        `seed` - the seed value
        `debug` - if true, debugging output is enabled

  - ### Method Detail

    - #### setDebug

          public void setDebug(boolean value)

      sets whether to print the generated random values or not
      Parameters:
        `value` - if true debugging output is enabled

    - #### getDebug

          public boolean getDebug()

      returns whether to print the generated random values or not
      Returns:
        true if debugging output is enabled

    - #### setLog

          public void setLog(Debug.Log value)

      the log to use, if it is null then stdout is used
      Parameters:
        `value` - the log to use

    - #### getLog

          public Debug.Log getLog()

      the currently used log, if null then stdout is used for outputting the debugging information
      Returns:
        the log, can be null

    - #### getID

          public long getID()

      returns the unique ID of this number generator
      Returns:
        the unique ID of this number generator

    - #### printStackTrace

          public void printStackTrace()

      prints the current stacktrace

    - #### nextBoolean

          public boolean nextBoolean()

      Returns the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence.
      Overrides:
        `nextBoolean` in class `java.util.Random`
      Returns:
        random boolean

    - #### nextBytes

          public void nextBytes(byte[] bytes)

      Generates random bytes and places them into a user-supplied byte array.
      Overrides:
        `nextBytes` in class `java.util.Random`
      Parameters:
        `bytes` - array to fill with random bytes

    - #### 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.
      Overrides:
        `nextDouble` in class `java.util.Random`
      Returns:
        random double

    - #### 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.
      Overrides:
        `nextFloat` in class `java.util.Random`
      Returns:
        random float

    - #### 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.
      Overrides:
        `nextGaussian` in class `java.util.Random`
      Returns:
        random double, gaussian distributed

    - #### nextInt

          public int nextInt()

      Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.
      Overrides:
        `nextInt` in class `java.util.Random`
      Returns:
        random int

    - #### 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.
      Overrides:
        `nextInt` in class `java.util.Random`
      Parameters:
        `n` - the upper limit (exclusive)
      Returns:
        random int

    - #### nextLong

          public long nextLong()

      Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence.
      Overrides:
        `nextLong` in class `java.util.Random`
      Returns:
        random long

    - #### setSeed

          public void setSeed(long seed)

      Sets the seed of this random number generator using a single long seed.
      Overrides:
        `setSeed` in class `java.util.Random`
      Parameters:
        `seed` - the seed value

    - #### toString

          public java.lang.String toString()

      returns a string representation of this number generator
      Overrides:
        `toString` in class `java.lang.Object`
      Returns:
        a string representation

    - #### getRevision

          public java.lang.String getRevision()

      Returns the revision string.
      Specified by:
        `getRevision` in interface `RevisionHandler`
      Returns:
        the revision