ThreadLocalRandom Class

Definition

A random number generator (with period 2<sup>64</sup>) isolated to the current thread.

[Android.Runtime.Register("java/util/concurrent/ThreadLocalRandom", DoNotGenerateAcw=true)]
public class ThreadLocalRandom : Java.Util.Random
[<Android.Runtime.Register("java/util/concurrent/ThreadLocalRandom", DoNotGenerateAcw=true)>]
type ThreadLocalRandom = class
    inherit Random
Inheritance
ThreadLocalRandom
Attributes

Remarks

A random number generator (with period 2<sup>64</sup>) 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.

Instances of ThreadLocalRandom 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 1.7.

Java documentation for java.util.concurrent.ThreadLocalRandom.

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

ThreadLocalRandom(IntPtr, JniHandleOwnership)

A constructor used when creating managed representations of JNI objects; called by the runtime.

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.

ThresholdType

This API supports the Mono for Android infrastructure and is not intended to be used directly from your code.

Methods

Clone()

Creates and returns a copy of this object.

(Inherited from Object)
Current()

Returns the current thread's ThreadLocalRandom 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)
Next(Int32)

Generates the next pseudorandom number.

(Inherited from Random)
NextBoolean()

Returns the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence.

(Inherited from Random)
NextBytes(Byte[])

Generates random bytes and places them into a user-supplied byte array.

(Inherited from Random)
NextDouble()

Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.

(Inherited from Random)
NextDouble(Double)

Returns a pseudorandom double value between 0.

NextDouble(Double, Double)

Returns a pseudorandom double value between the specified origin (inclusive) and bound (exclusive).

NextFloat()

Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.

(Inherited from Random)
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.

(Inherited from Random)
NextInt()

Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.

(Inherited from Random)
NextInt(Int32)

Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.

(Inherited from Random)
NextInt(Int32, Int32)

Returns a pseudorandom int value between the specified origin (inclusive) and the specified bound (exclusive).

NextLong()

Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence.

(Inherited from Random)
NextLong(Int64)

Returns a pseudorandom long value between zero (inclusive) and the specified bound (exclusive).

NextLong(Int64, Int64)

Returns a pseudorandom long value between the specified origin (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)
SetSeed(Int64)

Sets the seed of this random number generator using a single long seed.

(Inherited from Random)
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)

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, 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)

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