Spec-Zone .ru
спецификации, руководства, описания, API
|
In JDK 7,
java.util.concurrent
includes a convenience class,
ThreadLocalRandom
ForkJoinTask
s.
For concurrent access, using ThreadLocalRandom
instead of Math.random()
results in less contention and, ultimately, better performance.
All you need to do is call ThreadLocalRandom.current()
, then call one of its methods to retrieve a random number. Here is one example:
int r = ThreadLocalRandom.current() .nextInt(4, 77);