AsynchronousFileChannel

public abstract class AsynchronousFileChannel
extends Object implements AsynchronousChannel

java.lang.Object
↳	java.nio.channels.AsynchronousFileChannel

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An asynchronous channel for reading, writing, and manipulating a file.

An asynchronous file channel is created when a file is opened by invoking one of the open methods defined by this class. The file contains a variable-length sequence of bytes that can be read and written and whose current size can be queried. The size of the file increases when bytes are written beyond its current size; the size of the file decreases when it is truncated.

An asynchronous file channel does not have a current position within the file. Instead, the file position is specified to each read and write method that initiates asynchronous operations. A CompletionHandler is specified as a parameter and is invoked to consume the result of the I/O operation. This class also defines read and write methods that initiate asynchronous operations, returning a Future to represent the pending result of the operation. The Future may be used to check if the operation