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

Type Hierarchy

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Inherited

ThreadLocalRandom
Random
Serializable
AnyRef
Any

Implicitly

by any2stringadd
by StringFormat
by Ensuring
by ArrowAssoc

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All

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
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
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()
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@native() @HotSpotIntrinsicCandidate() @throws( ... )
def doubles(arg0: Double, arg1: Double): DoubleStream

Definition Classes
Random
def doubles(arg0: Long, arg1: Double, arg2: Double): DoubleStream

Definition Classes
Random
def doubles(): DoubleStream

Definition Classes
Random
def doubles(arg0: Long): DoubleStream

Definition Classes
Random
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
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
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
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
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
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()
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
Annotations
@native() @HotSpotIntrinsicCandidate()
def hashCode(): Int

Definition Classes
AnyRef → Any
Annotations
@native() @HotSpotIntrinsicCandidate()
def ints(arg0: Int, arg1: Int): IntStream

Definition Classes
Random
def ints(arg0: Long, arg1: Int, arg2: Int): IntStream

Definition Classes
Random
def ints(): IntStream

Definition Classes
Random
def ints(arg0: Long): IntStream

Definition Classes
Random
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def longs(arg0: Long, arg1: Long): LongStream

Definition Classes
Random
def longs(arg0: Long, arg1: Long, arg2: Long): LongStream

Definition Classes
Random
def longs(): LongStream

Definition Classes
Random
def longs(arg0: Long): LongStream

Definition Classes
Random
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def next(bits: Int): Int

Attributes
protected[akka.dispatch.forkjoin]
Definition Classes
ThreadLocalRandom → Random
def nextBoolean(): Boolean

Definition Classes
Random
def nextBytes(arg0: Array[Byte]): Unit

Definition Classes
Random
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
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
def nextDouble(): Double

Definition Classes
Random
def nextFloat(): Float

Definition Classes
Random
def nextGaussian(): Double

Definition Classes
Random
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
def nextInt(arg0: Int): Int

Definition Classes
Random
def nextInt(): Int

Definition Classes
Random
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
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
def nextLong(): Long

Definition Classes
Random
final def notify(): Unit

Definition Classes
AnyRef
Annotations
@native() @HotSpotIntrinsicCandidate()
final def notifyAll(): Unit

Definition Classes
AnyRef
Annotations
@native() @HotSpotIntrinsicCandidate()
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
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@native() @throws( ... )
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

Packages

ThreadLocalRandom

class ThreadLocalRandom extends Random

Value Members

Deprecated Value Members

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]

Packages

ThreadLocalRandom 

class ThreadLocalRandom extends Random

Value Members

Deprecated Value Members

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]

ThreadLocalRandom