Returns a Callable object that, when called, runs the given privileged action and returns its result.

  Returns a Callable object that, when
called, runs the given privileged action and returns its result.
Returns: a callable object
Parameters:
- action - the privileged action to run
Throws:
- NullPointerException - if action null

  Returns a Callable object that, when called, runs the given privileged exception action and returns its result.

  Returns a Callable object that, when
called, runs the given privileged exception action and returns
its result.
Returns: a callable object
Parameters:
- action - the privileged exception action to run
Throws:
- NullPointerException - if action null

  Returns a Callable object that, when called, runs the given task and returns null.

  Returns a Callable object that, when
called, runs the given task and returns null.
Returns: a callable object
Parameters:
- task - the task to run
Throws:
- NullPointerException - if task null

  Returns a Callable object that, when called, runs the given task and returns the given result.

  Returns a Callable object that, when
called, runs the given task and returns the given result. This
can be useful when applying methods requiring a
Callable to an otherwise resultless action.
Returns: a callable object
Parameters:
- task - the task to run
- result - the result to return
Throws:
- NullPointerException - if task null

  Returns a default thread factory used to create new threads.

  Returns a default thread factory used to create new threads.
This factory creates all new threads used by an Executor in the
same ThreadGroup. If there is a SecurityManager, it uses the group of System.getSecurityManager(), else the group of the thread
invoking this defaultThreadFactory method. Each new
thread is created as a non-daemon thread with priority set to
the smaller of Thread.NORM_PRIORITY and the maximum
priority permitted in the thread group. New threads have names
accessible via Thread.getName() of
pool-N-thread-M, where N is the sequence
number of this factory, and M is the sequence number
of the thread created by this factory.
Returns: a thread factory

  Creates a thread pool that creates new threads as needed, but will reuse previously constructed threads when they are available.

  Creates a thread pool that creates new threads as needed, but
will reuse previously constructed threads when they are
available. These pools will typically improve the performance
of programs that execute many short-lived asynchronous tasks.
Calls to execute will reuse previously constructed
threads if available. If no existing thread is available, a new
thread will be created and added to the pool. Threads that have
not been used for sixty seconds are terminated and removed from
the cache. Thus, a pool that remains idle for long enough will
not consume any resources. Note that pools with similar
properties but different details (for example, timeout parameters)
may be created using ThreadPoolExecutor constructors.
Returns: the newly created thread pool

  Creates a thread pool that creates new threads as needed, but will reuse previously constructed threads when they are available, and uses the provided ThreadFactory to create new threads when needed.

  Creates a thread pool that creates new threads as needed, but
will reuse previously constructed threads when they are
available, and uses the provided
ThreadFactory to create new threads when needed.
Returns: the newly created thread pool
Parameters:
- threadFactory - the factory to use when creating new threads
Throws:
- NullPointerException - if threadFactory is null

  Creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue.

  Creates a thread pool that reuses a fixed number of threads
operating off a shared unbounded queue. At any point, at most
nThreads threads will be active processing tasks.
If additional tasks are submitted when all threads are active,
they will wait in the queue until a thread is available.
If any thread terminates due to a failure during execution
prior to shutdown, a new one will take its place if needed to
execute subsequent tasks. The threads in the pool will exist
until it is explicitly shutdown.
Returns: the newly created thread pool
Parameters:
- nThreads - the number of threads in the pool
Throws:
- IllegalArgumentException - if nThreads <= 0

  Creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue, using the provided ThreadFactory to create new threads when needed.

  Creates a thread pool that reuses a fixed number of threads
operating off a shared unbounded queue, using the provided
ThreadFactory to create new threads when needed. At any point,
at most nThreads threads will be active processing
tasks. If additional tasks are submitted when all threads are
active, they will wait in the queue until a thread is
available. If any thread terminates due to a failure during
execution prior to shutdown, a new one will take its place if
needed to execute subsequent tasks. The threads in the pool will
exist until it is explicitly shutdown.
Returns: the newly created thread pool
Parameters:
- nThreads - the number of threads in the pool
- threadFactory - the factory to use when creating new threads
Throws:
- NullPointerException - if threadFactory is null
- IllegalArgumentException - if nThreads <= 0

  Creates a thread pool that can schedule commands to run after a given delay, or to execute periodically.

  Creates a thread pool that can schedule commands to run after a
given delay, or to execute periodically.
Returns: a newly created scheduled thread pool
Parameters:
- corePoolSize - the number of threads to keep in the pool, even if they are idle.
Throws:
- IllegalArgumentException - if corePoolSize < 0

  Creates a thread pool that can schedule commands to run after a given delay, or to execute periodically.

  Creates a thread pool that can schedule commands to run after a
given delay, or to execute periodically.
Returns: a newly created scheduled thread pool
Parameters:
- corePoolSize - the number of threads to keep in the pool, even if they are idle.
- threadFactory - the factory to use when the executor creates a new thread.
Throws:
- IllegalArgumentException - if corePoolSize < 0
- NullPointerException - if threadFactory is null

  Creates an Executor that uses a single worker thread operating off an unbounded queue.

  Creates an Executor that uses a single worker thread operating
off an unbounded queue. (Note however that if this single
thread terminates due to a failure during execution prior to
shutdown, a new one will take its place if needed to execute
subsequent tasks.) Tasks are guaranteed to execute
sequentially, and no more than one task will be active at any
given time. Unlike the otherwise equivalent
newFixedThreadPool(1) the returned executor is
guaranteed not to be reconfigurable to use additional threads.
Returns: the newly created single-threaded Executor

  Creates an Executor that uses a single worker thread operating off an unbounded queue, and uses the provided ThreadFactory to create a new thread when needed.

  Creates an Executor that uses a single worker thread operating
off an unbounded queue, and uses the provided ThreadFactory to
create a new thread when needed. Unlike the otherwise
equivalent newFixedThreadPool(1, threadFactory) the
returned executor is guaranteed not to be reconfigurable to use
additional threads.
Returns: the newly created single-threaded Executor
Parameters:
- threadFactory - the factory to use when creating new threads
Throws:
- NullPointerException - if threadFactory is null

  Creates a single-threaded executor that can schedule commands to run after a given delay, or to execute periodically.

  Creates a single-threaded executor that can schedule commands
to run after a given delay, or to execute periodically.
(Note however that if this single
thread terminates due to a failure during execution prior to
shutdown, a new one will take its place if needed to execute
subsequent tasks.) Tasks are guaranteed to execute
sequentially, and no more than one task will be active at any
given time. Unlike the otherwise equivalent
newScheduledThreadPool(1) the returned executor is
guaranteed not to be reconfigurable to use additional threads.
Returns: the newly created scheduled executor

  Creates a single-threaded executor that can schedule commands to run after a given delay, or to execute periodically.

  Creates a single-threaded executor that can schedule commands
to run after a given delay, or to execute periodically. (Note
however that if this single thread terminates due to a failure
during execution prior to shutdown, a new one will take its
place if needed to execute subsequent tasks.) Tasks are
guaranteed to execute sequentially, and no more than one task
will be active at any given time. Unlike the otherwise
equivalent newScheduledThreadPool(1, threadFactory)
the returned executor is guaranteed not to be reconfigurable to
use additional threads.
Returns: a newly created scheduled executor
Parameters:
- threadFactory - the factory to use when creating new threads
Throws:
- NullPointerException - if threadFactory is null

  Returns a Callable object that will, when called, execute the given callable under the current access control context.

  Returns a Callable object that will, when
called, execute the given callable under the current
access control context. This method should normally be
invoked within an AccessController.doPrivileged(java.security.PrivilegedAction) action
to create callables that will, if possible, execute under the
selected permission settings holding within that action; or if
not possible, throw an associated AccessControlException.
Returns: a callable object
Parameters:
- callable - the underlying task
Throws:
- NullPointerException - if callable null

  Returns a Callable object that will, when called, execute the given callable under the current access control context, with the current context class loader as the context class loader.

  Returns a Callable object that will, when
called, execute the given callable under the current
access control context, with the current context class loader
as the context class loader. This method should normally be
invoked within an AccessController.doPrivileged(java.security.PrivilegedAction) action
to create callables that will, if possible, execute under the
selected permission settings holding within that action; or if
not possible, throw an associated AccessControlException.
Returns: a callable object
Parameters:
- callable - the underlying task
Throws:
- NullPointerException - if callable null
- AccessControlException - if the current access control context does not have permission to both set and get context class loader.

  Returns a thread factory used to create new threads that have the same permissions as the current thread.

  Returns a thread factory used to create new threads that have the same permissions as the current thread. This factory creates threads with the same settings as Executors.defaultThreadFactory(), additionally setting the AccessControlContext and contextClassLoader of new threads to be the same as the thread invoking this privilegedThreadFactory method. A new privilegedThreadFactory can be created within an AccessController.doPrivileged(java.security.PrivilegedAction) action setting the current thread's access control context to create threads with the selected permission settings holding within that action.

Note that while tasks running within such threads will have the same access control and class loader settings as the current thread, they need not have the same ThreadLocal or InheritableThreadLocal values. If necessary, particular values of thread locals can be set or reset before any task runs in ThreadPoolExecutor subclasses using ThreadPoolExecutor.beforeExecute(java.lang.Thread, java.lang.Runnable). Also, if it is necessary to initialize worker threads to have the same InheritableThreadLocal settings as some other designated thread, you can create a custom ThreadFactory in which that thread waits for and services requests to create others that will inherit its values.
Returns: a thread factory
Throws:
- AccessControlException - if the current access control context does not have permission to both get and set context class loader.

  Returns an object that delegates all defined ExecutorService methods to the given executor, but not any other methods that might otherwise be accessible using casts.

  Returns an object that delegates all defined ExecutorService methods to the given executor, but not any
other methods that might otherwise be accessible using
casts. This provides a way to safely "freeze" configuration and
disallow tuning of a given concrete implementation.
Returns: an ExecutorService instance
Parameters:
- executor - the underlying implementation
Throws:
- NullPointerException - if executor null

  Returns an object that delegates all defined ScheduledExecutorService methods to the given executor, but not any other methods that might otherwise be accessible using casts.

  Returns an object that delegates all defined ScheduledExecutorService methods to the given executor, but
not any other methods that might otherwise be accessible using
casts. This provides a way to safely "freeze" configuration and
disallow tuning of a given concrete implementation.
Returns: a ScheduledExecutorService instance
Parameters:
- executor - the underlying implementation
Throws:
- NullPointerException - if executor null