| 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.channelspackage. | 
| java.nio.file.spi | Service-provider classes for the  java.nio.filepackage. | 
| java.util.concurrent | Utility classes commonly useful in concurrent programming. | 
| Modifier and Type | Method and 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. | 
| Modifier and Type | Method and Description | 
|---|---|
| abstract AsynchronousChannelGroup | AsynchronousChannelProvider. openAsynchronousChannelGroup(ExecutorService executor,
                            int initialSize)Constructs a new asynchronous channel group with the given thread pool. | 
| Modifier and Type | Method and 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. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | ScheduledExecutorServiceAn  ExecutorServicethat can schedule commands to run after a given
 delay, or to execute periodically. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AbstractExecutorServiceProvides default implementations of  ExecutorServiceexecution methods. | 
| class  | ForkJoinPoolAn  ExecutorServicefor runningForkJoinTasks. | 
| class  | ScheduledThreadPoolExecutorA  ThreadPoolExecutorthat can additionally schedule
 commands to run after a given delay, or to execute
 periodically. | 
| class  | ThreadPoolExecutorAn  ExecutorServicethat executes each submitted task using
 one of possibly several pooled threads, normally configured
 usingExecutorsfactory methods. | 
| Modifier and Type | Method and 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. unconfigurableExecutorService(ExecutorService executor)Returns an object that delegates all defined  ExecutorServicemethods to the given executor, but not any
 other methods that might otherwise be accessible using
 casts. | 
| Modifier and Type | Method and Description | 
|---|---|
| static ExecutorService | Executors. unconfigurableExecutorService(ExecutorService executor)Returns an object that delegates all defined  ExecutorServicemethods to the given executor, but not any
 other methods that might otherwise be accessible using
 casts. | 
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