Packages

c

akka.dispatch.forkjoin

ThreadLocalRandom

class ThreadLocalRandom extends Random

A random number generator isolated to the current thread. Like the global java.util.Random generator used by the java.lang.Math class, a ThreadLocalRandom is initialized with an internally generated seed that may not otherwise be modified. When applicable, use of ThreadLocalRandom rather than shared Random objects in concurrent programs will typically encounter much less overhead and contention. Use of ThreadLocalRandom is particularly appropriate when multiple tasks (for example, each a ForkJoinTask) use random numbers in parallel in thread pools.

Usages of this class should typically be of the form: ThreadLocalRandom.current().nextX(...) (where X is Int, Long, etc). When all usages are of this form, it is never possible to accidentally share a ThreadLocalRandom across multiple threads.

This class also provides additional commonly used bounded random generation methods.

Source
ThreadLocalRandom.java
Since

1.7

Linear Supertypes
Random, Serializable, AnyRef, Any
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Inherited
  1. ThreadLocalRandom
  2. Random
  3. Serializable
  4. AnyRef
  5. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to any2stringadd[ThreadLocalRandom] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (ThreadLocalRandom, B)
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to ArrowAssoc[ThreadLocalRandom] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate() @throws( ... )
  8. def doubles(arg0: Double, arg1: Double): DoubleStream
    Definition Classes
    Random
  9. def doubles(arg0: Long, arg1: Double, arg2: Double): DoubleStream
    Definition Classes
    Random
  10. def doubles(): DoubleStream
    Definition Classes
    Random
  11. def doubles(arg0: Long): DoubleStream
    Definition Classes
    Random
  12. def ensuring(cond: (ThreadLocalRandom) ⇒ Boolean, msg: ⇒ Any): ThreadLocalRandom
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to Ensuring[ThreadLocalRandom] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: (ThreadLocalRandom) ⇒ Boolean): ThreadLocalRandom
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to Ensuring[ThreadLocalRandom] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: Boolean, msg: ⇒ Any): ThreadLocalRandom
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to Ensuring[ThreadLocalRandom] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: Boolean): ThreadLocalRandom
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to Ensuring[ThreadLocalRandom] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  17. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  18. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to StringFormat[ThreadLocalRandom] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  19. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  20. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  21. def ints(arg0: Int, arg1: Int): IntStream
    Definition Classes
    Random
  22. def ints(arg0: Long, arg1: Int, arg2: Int): IntStream
    Definition Classes
    Random
  23. def ints(): IntStream
    Definition Classes
    Random
  24. def ints(arg0: Long): IntStream
    Definition Classes
    Random
  25. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  26. def longs(arg0: Long, arg1: Long): LongStream
    Definition Classes
    Random
  27. def longs(arg0: Long, arg1: Long, arg2: Long): LongStream
    Definition Classes
    Random
  28. def longs(): LongStream
    Definition Classes
    Random
  29. def longs(arg0: Long): LongStream
    Definition Classes
    Random
  30. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  31. def next(bits: Int): Int
    Attributes
    protected[akka.dispatch.forkjoin]
    Definition Classes
    ThreadLocalRandom → Random
  32. def nextBoolean(): Boolean
    Definition Classes
    Random
  33. def nextBytes(arg0: Array[Byte]): Unit
    Definition Classes
    Random
  34. def nextDouble(least: Double, bound: Double): Double

    Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

    Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

    least

    the least value returned

    bound

    the upper bound (exclusive)

    returns

    the next value

    Exceptions thrown

    IllegalArgumentException if least greater than or equal to bound

  35. def nextDouble(n: Double): Double

    Returns a pseudorandom, uniformly distributed double value between 0 (inclusive) and the specified value (exclusive).

    Returns a pseudorandom, uniformly distributed double value between 0 (inclusive) and the specified value (exclusive).

    n

    the bound on the random number to be returned. Must be positive.

    returns

    the next value

    Exceptions thrown

    IllegalArgumentException if n is not positive

  36. def nextDouble(): Double
    Definition Classes
    Random
  37. def nextFloat(): Float
    Definition Classes
    Random
  38. def nextGaussian(): Double
    Definition Classes
    Random
  39. def nextInt(least: Int, bound: Int): Int

    Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

    Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

    least

    the least value returned

    bound

    the upper bound (exclusive)

    returns

    the next value

    Exceptions thrown

    IllegalArgumentException if least greater than or equal to bound

  40. def nextInt(arg0: Int): Int
    Definition Classes
    Random
  41. def nextInt(): Int
    Definition Classes
    Random
  42. def nextLong(least: Long, bound: Long): Long

    Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

    Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

    least

    the least value returned

    bound

    the upper bound (exclusive)

    returns

    the next value

    Exceptions thrown

    IllegalArgumentException if least greater than or equal to bound

  43. def nextLong(n: Long): Long

    Returns a pseudorandom, uniformly distributed value between 0 (inclusive) and the specified value (exclusive).

    Returns a pseudorandom, uniformly distributed value between 0 (inclusive) and the specified value (exclusive).

    n

    the bound on the random number to be returned. Must be positive.

    returns

    the next value

    Exceptions thrown

    IllegalArgumentException if n is not positive

  44. def nextLong(): Long
    Definition Classes
    Random
  45. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  46. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  47. def setSeed(seed: Long): Unit

    Throws UnsupportedOperationException.

    Throws UnsupportedOperationException. Setting seeds in this generator is not supported.

    Definition Classes
    ThreadLocalRandom → Random
    Exceptions thrown

    UnsupportedOperationException always

  48. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  49. def toString(): String
    Definition Classes
    AnyRef → Any
  50. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  51. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  52. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  53. def →[B](y: B): (ThreadLocalRandom, B)
    Implicit
    This member is added by an implicit conversion from ThreadLocalRandom to ArrowAssoc[ThreadLocalRandom] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @Deprecated @deprecated @throws( classOf[java.lang.Throwable] )
    Deprecated

    (Since version ) see corresponding Javadoc for more information.

Inherited from Random

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from ThreadLocalRandom to any2stringadd[ThreadLocalRandom]

Inherited by implicit conversion StringFormat from ThreadLocalRandom to StringFormat[ThreadLocalRandom]

Inherited by implicit conversion Ensuring from ThreadLocalRandom to Ensuring[ThreadLocalRandom]

Inherited by implicit conversion ArrowAssoc from ThreadLocalRandom to ArrowAssoc[ThreadLocalRandom]

Ungrouped