Utility classes commonly useful in concurrent programming.
class
A
ThreadPoolExecutor
that can additionally schedule
commands to run after a given delay, or to execute periodically.
void
void
Always throws RejectedExecutionException.
void
Executes task r in the caller's thread, unless the executor
has been shut down, in which case the task is discarded.
void
Obtains and ignores the next task that the executor
would otherwise execute, if one is immediately available,
and then retries execution of task r, unless the executor
is shut down, in which case task r is instead discarded.
void
Does nothing, which has the effect of discarding task r.
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