Core Java™ 2 Volume II - Advanced Features, Seventh Edition

Synchronizers

The java.util.concurrent package contains several classes that help manage a set of collaborating threads—see Table 1-3. These mechanisms have “canned functionality” for common rendezvous patterns between threads. If you have a set of collaborating threads that follows one of these behavior patterns, you should simply reuse the appropriate library class instead of trying to come up with a handcrafted collection of locks.

Table 1-3. Synchronizers

Class	What It Does	When To Use
CyclicBarrier	Allows a set of threads to wait until a predefined count of them has reached a common barrier, and then optionally executes a barrier action.	When a number of threads need to complete before their results can be used.
CountDownLatch	Allows a set of threads ...