| Package | Description | 
|---|---|
| java.util.concurrent | Utility classes commonly useful in concurrent programming. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ScheduledThreadPoolExecutorA  ThreadPoolExecutorthat can additionally schedule
 commands to run after a given delay, or to execute
 periodically. | 
| Modifier and Type | Method and Description | 
|---|---|
| static ScheduledExecutorService | Executors. newScheduledThreadPool(int corePoolSize)Creates a thread pool that can schedule commands to run after a
 given delay, or to execute periodically. | 
| static ScheduledExecutorService | Executors. newScheduledThreadPool(int corePoolSize,
                      ThreadFactory threadFactory)Creates a thread pool that can schedule commands to run after a
 given delay, or to execute periodically. | 
| static ScheduledExecutorService | Executors. newSingleThreadScheduledExecutor()Creates a single-threaded executor that can schedule commands
 to run after a given delay, or to execute periodically. | 
| static ScheduledExecutorService | Executors. newSingleThreadScheduledExecutor(ThreadFactory threadFactory)Creates a single-threaded executor that can schedule commands
 to run after a given delay, or to execute periodically. | 
| static ScheduledExecutorService | Executors. unconfigurableScheduledExecutorService(ScheduledExecutorService executor)Returns an object that delegates all defined  ScheduledExecutorServicemethods to the given executor, but
 not any other methods that might otherwise be accessible using
 casts. | 
| Modifier and Type | Method and Description | 
|---|---|
| static ScheduledExecutorService | Executors. unconfigurableScheduledExecutorService(ScheduledExecutorService executor)Returns an object that delegates all defined  ScheduledExecutorServicemethods to the given executor, but
 not any other methods that might otherwise be accessible using
 casts. | 
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