| Maintains a set of ReusableThreads. When a thread is to be returned, all existing threads
are checked: when one is available, it will be returned. Otherwise, a new thread is created
and returned, unless the pool limit is reached, in which case null is returned.
Creates threads only as needed, up to the MAX_NUM limit. However, does not shrink the pool
when more threads become available than are used.
author: Bela Ban |