# Uses of Interface
java.util.concurrent.ExecutorService

Packages that use ExecutorService
Package
Description
java.nio.channels
Defines channels, which represent connections to entities that are capable of performing I/O operations, such as files and sockets; defines selectors, for multiplexed, non-blocking I/O operations.
java.nio.channels.spi
Service-provider classes for the `java.nio.channels` package.
java.nio.file.spi
Service-provider classes for the `java.nio.file` package.
java.util.concurrent
Utility classes commonly useful in concurrent programming.

## Uses of ExecutorService in java.nio.channels

Methods in java.nio.channels with parameters of type ExecutorService
Modifier and Type
Method
Description
`static AsynchronousFileChannel`
AsynchronousFileChannel.`open(Path file, Set<? extends OpenOption> options, ExecutorService executor, FileAttribute<?>... attrs)`
Opens or creates a file for reading and/or writing, returning an asynchronous file channel to access the file.
`static AsynchronousChannelGroup`
AsynchronousChannelGroup.`withCachedThreadPool(ExecutorService executor, int initialSize)`
Creates an asynchronous channel group with a given thread pool that creates new threads as needed.
`static AsynchronousChannelGroup`
AsynchronousChannelGroup.`withThreadPool(ExecutorService executor)`
Creates an asynchronous channel group with a given thread pool.

## Uses of ExecutorService in java.nio.channels.spi

Methods in java.nio.channels.spi with parameters of type ExecutorService
Modifier and Type
Method
Description
`abstract AsynchronousChannelGroup`
AsynchronousChannelProvider.`openAsynchronousChannelGroup(ExecutorService executor, int initialSize)`
Constructs a new asynchronous channel group with the given thread pool.

## Uses of ExecutorService in java.nio.file.spi

Methods in java.nio.file.spi with parameters of type ExecutorService
Modifier and Type
Method
Description
`AsynchronousFileChannel`
FileSystemProvider.`newAsynchronousFileChannel(Path path, Set<? extends OpenOption> options, ExecutorService executor, FileAttribute<?>... attrs)`
Opens or creates a file for reading and/or writing, returning an asynchronous file channel to access the file.

## Uses of ExecutorService in java.util.concurrent

Subinterfaces of ExecutorService in java.util.concurrent
Modifier and Type
Interface
Description
`interface`
`ScheduledExecutorService`
An `ExecutorService` that can schedule commands to run after a given delay, or to execute periodically.
Classes in java.util.concurrent that implement ExecutorService
Modifier and Type
Class
Description
`class`
`AbstractExecutorService`
Provides default implementations of `ExecutorService` execution methods.
`class`
`ForkJoinPool`
An `ExecutorService` for running `ForkJoinTask`s.
`class`
`ScheduledThreadPoolExecutor`
A `ThreadPoolExecutor` that can additionally schedule commands to run after a given delay, or to execute periodically.
`class`
`ThreadPoolExecutor`
An `ExecutorService` that executes each submitted task using one of possibly several pooled threads, normally configured using `Executors` factory methods.
Methods in java.util.concurrent that return ExecutorService
Modifier and Type
Method
Description
`static ExecutorService`
Executors.`newCachedThreadPool()`
Creates a thread pool that creates new threads as needed, but will reuse previously constructed threads when they are available.
`static ExecutorService`
Executors.`newCachedThreadPool(ThreadFactory threadFactory)`
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.
`static ExecutorService`
Executors.`newFixedThreadPool(int nThreads)`
Creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue.
`static ExecutorService`
Executors.`newFixedThreadPool(int nThreads, ThreadFactory threadFactory)`
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.
`static ExecutorService`
Executors.`newSingleThreadExecutor()`
Creates an Executor that uses a single worker thread operating off an unbounded queue.
`static ExecutorService`
Executors.`newSingleThreadExecutor(ThreadFactory threadFactory)`
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.
`static ExecutorService`
Executors.`newWorkStealingPool()`
Creates a work-stealing thread pool using the number of available processors as its target parallelism level.
`static ExecutorService`
Executors.`newWorkStealingPool(int parallelism)`
Creates a thread pool that maintains enough threads to support the given parallelism level, and may use multiple queues to reduce contention.
`static ExecutorService`
Executors.`unconfigurableExecutorService(ExecutorService executor)`
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.
Methods in java.util.concurrent with parameters of type ExecutorService
Modifier and Type
Method
Description
`static ExecutorService`
Executors.`unconfigurableExecutorService(ExecutorService executor)`
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.