Added in API level 26

WatchEvent

public interface WatchEvent

java.nio.file.WatchEvent<T>

An event or a repeated event for an object that is registered with a WatchService.

An event is classified by its kind and has a count to indicate the number of times that the event has been observed. This allows for efficient representation of repeated events. The context method returns any context associated with the event. In the case of a repeated event then the context is the same for all events.

Watch events are immutable and safe for use by multiple concurrent threads.

Summary

Nested classes

interface WatchEvent.Kind<T>

An event kind, for the purposes of identification. 

interface WatchEvent.Modifier

An event modifier that qualifies how a Watchable is registered with a WatchService. 

Public methods

abstract T context()

Returns the context for the event.

abstract int count()

Returns the event count.

abstract Kind<T> kind()

Returns the event kind.

Public methods

context

Added in API level 26 
public abstract T context ()

Returns the context for the event.

In the case of ENTRY_CREATE, ENTRY_DELETE, and ENTRY_MODIFY events the context is a Path that is the relative path between the directory registered with the watch service, and the entry that is created, deleted, or modified.

Returns
T the event context; may be null

count

Added in API level 26 
public abstract int count ()

Returns the event count. If the event count is greater than 1 then this is a repeated event.

Returns
int the event count

kind

Added in API level 26 
public abstract Kind<T> kind ()

Returns the event kind.

Returns
Kind<T> the event kind