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# Concurrency Utilities Enhancements in Java SE 7

The fork/join framework, which is based on the `ForkJoinPool` class, is an implementation of the `Executor` interface. It is designed to efficiently run a large number of tasks using a pool of worker threads. A work-stealing technique is used to keep all the worker threads busy, to take full advantage of multiple processors. See Fork/Join in The Java Tutorials. The directory `<Java home>/sample/forkjoin/` contains samples that demonstrate the fork/join framework.

The `ThreadLocalRandom` class eliminates contention among threads using pseudo-random numbers; see Concurrent Random Numbers.

The `Phaser` class is a new synchronization barrier, similar to `CyclicBarrier`.

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