SplittableRandom Class

Reference

Definition

Namespace:: Java.Util

Assembly:: Mono.Android.dll

Important

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A generator of uniform pseudorandom values applicable for use in (among other contexts) isolated parallel computations that may generate subtasks.

[Android.Runtime.Register("java/util/SplittableRandom", ApiSince=24, DoNotGenerateAcw=true)]
public sealed class SplittableRandom : Java.Lang.Object

[<Android.Runtime.Register("java/util/SplittableRandom", ApiSince=24, DoNotGenerateAcw=true)>]
type SplittableRandom = class
    inherit Object

Inheritance: Object

Object
SplittableRandom

Attributes: RegisterAttribute

Remarks

A generator of uniform pseudorandom values applicable for use in (among other contexts) isolated parallel computations that may generate subtasks. Class SplittableRandom supports methods for producing pseudorandom numbers of type int, long, and double with similar usages as for class java.util.Random but differs in the following ways:

<ul>

<li>Series of generated values pass the DieHarder suite testing independence and uniformity properties of random number generators. (Most recently validated with version 3.31.1.) These tests validate only the methods for certain types and ranges, but similar properties are expected to hold, at least approximately, for others as well. The period (length of any series of generated values before it repeats) is at least 264.

<li>Method #split constructs and returns a new SplittableRandom instance that shares no mutable state with the current instance. However, with very high probability, the values collectively generated by the two objects have the same statistical properties as if the same quantity of values were generated by a single thread using a single SplittableRandom object.

<li>Instances of SplittableRandom are not thread-safe. They are designed to be split, not shared, across threads. For example, a java.util.concurrent.ForkJoinTask fork/join-style computation using random numbers might include a construction of the form new Subtask(aSplittableRandom.split()).fork().

<li>This class provides additional methods for generating random streams, that employ the above techniques when used in stream.parallel() mode.

</ul>

Instances of SplittableRandom are not cryptographically secure. Consider instead using java.security.SecureRandom in security-sensitive applications. Additionally, default-constructed instances do not use a cryptographically random seed unless the System#getProperty system propertyjava.util.secureRandomSeed is set to true.

Added in 1.8.

Java documentation for java.util.SplittableRandom.

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Constructors

SplittableRandom()	Creates a new SplittableRandom instance that is likely to generate sequences of values that are statistically independent of those of any other instances in the current program; and may, and typically does, vary across program invocations.
SplittableRandom(Int64)	Creates a new SplittableRandom instance using the specified initial seed.

Properties

Class	Returns the runtime class of this `Object`. (Inherited from Object)
Handle	The handle to the underlying Android instance. (Inherited from Object)
JniIdentityHashCode	(Inherited from Object)
JniPeerMembers
PeerReference	(Inherited from Object)
ThresholdClass	This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. (Inherited from Object)
ThresholdType	This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. (Inherited from Object)

Methods

Clone()	Creates and returns a copy of this object. (Inherited from Object)
Dispose()	(Inherited from Object)
Dispose(Boolean)	(Inherited from Object)
Equals(Object)	Indicates whether some other object is "equal to" this one. (Inherited from Object)
GetHashCode()	Returns a hash code value for the object. (Inherited from Object)
JavaFinalize()	Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object)
NextBoolean()	Returns a pseudorandom `boolean` value.
NextBytes(Byte[])	Fills a user-supplied byte array with generated pseudorandom bytes.
NextDouble()	Returns a pseudorandom `double` value between zero (inclusive) and one (exclusive).
NextDouble(Double, Double)	Returns a pseudorandom `double` value between the specified origin (inclusive) and bound (exclusive).
NextDouble(Double)	Returns a pseudorandom `double` value between 0.
NextInt()	Returns a pseudorandom `int` value.
NextInt(Int32, Int32)	Returns a pseudorandom `int` value between the specified origin (inclusive) and the specified bound (exclusive).
NextInt(Int32)	Returns a pseudorandom `int` value between zero (inclusive) and the specified bound (exclusive).
NextLong()	Returns a pseudorandom `long` value.
NextLong(Int64, Int64)	Returns a pseudorandom `long` value between the specified origin (inclusive) and the specified bound (exclusive).
NextLong(Int64)	Returns a pseudorandom `long` value between zero (inclusive) and the specified bound (exclusive).
Notify()	Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object)
NotifyAll()	Wakes up all threads that are waiting on this object's monitor. (Inherited from Object)
SetHandle(IntPtr, JniHandleOwnership)	Sets the Handle property. (Inherited from Object)
Split()	Constructs and returns a new SplittableRandom instance that shares no mutable state with this instance.
ToArray<T>()	(Inherited from Object)
ToString()	Returns a string representation of the object. (Inherited from Object)
UnregisterFromRuntime()	(Inherited from Object)
Wait()	Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object)
Wait(Int64, Int32)	Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object)
Wait(Int64)	Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object)

Explicit Interface Implementations

IJavaPeerable.Disposed()	(Inherited from Object)
IJavaPeerable.DisposeUnlessReferenced()	(Inherited from Object)
IJavaPeerable.Finalized()	(Inherited from Object)
IJavaPeerable.JniManagedPeerState	(Inherited from Object)
IJavaPeerable.SetJniIdentityHashCode(Int32)	(Inherited from Object)
IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates)	(Inherited from Object)
IJavaPeerable.SetPeerReference(JniObjectReference)	(Inherited from Object)

Extension Methods

JavaCast<TResult>(IJavaObject)	Performs an Android runtime-checked type conversion.
JavaCast<TResult>(IJavaObject)
GetJniTypeName(IJavaPeerable)

Applies to

次の方法で共有