| Package | Description | 
|---|---|
| java.nio.file | Defines interfaces and classes for the Java virtual machine to access files,
 file attributes, and file systems. | 
| Modifier and Type | Method and Description | 
|---|---|
| WatchKey | WatchService. poll()Retrieves and removes the next watch key, or  nullif none are
 present. | 
| WatchKey | WatchService. poll(long timeout,
    TimeUnit unit)Retrieves and removes the next watch key, waiting if necessary up to the
 specified wait time if none are yet present. | 
| WatchKey | Path. register(WatchService watcher,
        WatchEvent.Kind<?>... events)Registers the file located by this path with a watch service. | 
| WatchKey | Watchable. register(WatchService watcher,
        WatchEvent.Kind<?>... events)Registers an object with a watch service. | 
| WatchKey | Path. register(WatchService watcher,
        WatchEvent.Kind<?>[] events,
        WatchEvent.Modifier... modifiers)Registers the file located by this path with a watch service. | 
| WatchKey | Watchable. register(WatchService watcher,
        WatchEvent.Kind<?>[] events,
        WatchEvent.Modifier... modifiers)Registers an object with a watch service. | 
| WatchKey | WatchService. take()Retrieves and removes next watch key, waiting if none are yet present. | 
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