org.jboss.netty.util.internal

类 ThreadLocalRandom

java.lang.Object

java.util.Random

org.jboss.netty.util.internal.ThreadLocalRandom

所有已实现的接口:

java.io.Serializable

public final class ThreadLocalRandom
extends java.util.Random

A random number generator isolated to the current thread. Like the global Random generator used by the 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 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 accidently share a ThreadLocalRandom across multiple threads.

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

从以下版本开始:

1.7

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
ThreadLocalRandom()

方法概要

方法

限定符和类型	方法和说明
static ThreadLocalRandom	current() Returns the current thread's ThreadLocalRandom.
protected int	next(int bits)
void	setSeed(long seed) Throws UnsupportedOperationException.

从类继承的方法 java.util.Random

nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ThreadLocalRandom

public ThreadLocalRandom()

方法详细资料

current

public static ThreadLocalRandom current()

Returns the current thread's ThreadLocalRandom.

返回:

the current thread's ThreadLocalRandom

setSeed

public void setSeed(long seed)

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

覆盖:

setSeed 在类中 java.util.Random

抛出:

java.lang.UnsupportedOperationException - always

next

protected int next(int bits)

覆盖:

next 在类中 java.util.Random