Channel

public interface Channel
implements Closeable

Known Indirect Subclasses AbstractInterruptibleChannel, AbstractSelectableChannel, ByteChannel, DatagramChannel, FileChannel, GatheringByteChannel, InterruptibleChannel, NetworkChannel, Pipe.SinkChannel, Pipe.SourceChannel, ReadableByteChannel, ScatteringByteChannel, SeekableByteChannel, SelectableChannel, ServerSocketChannel, SocketChannel, WritableByteChannel AbstractInterruptibleChannel Base implementation class for interruptible channels.  AbstractSelectableChannel Base implementation class for selectable channels.  ByteChannel A channel that can read and write bytes.  DatagramChannel A selectable channel for datagram-oriented sockets.  FileChannel A channel for reading, writing, mapping, and manipulating a file.  GatheringByteChannel A channel that can write bytes from a sequence of buffers.  InterruptibleChannel A channel that can be asynchronously closed and interrupted.  NetworkChannel A channel to a network socket.  Pipe.SinkChannel A channel representing the writable end of a Pipe.  Pipe.SourceChannel A channel representing the readable end of a Pipe.  ReadableByteChannel A channel that can read bytes.  ScatteringByteChannel A channel that can read bytes into a sequence of buffers.  SeekableByteChannel A byte channel that maintains a current position and allows the position to be changed.  SelectableChannel A channel that can be multiplexed via a Selector.  ServerSocketChannel A selectable channel for stream-oriented listening sockets.  SocketChannel A selectable channel for stream-oriented connecting sockets.  WritableByteChannel A channel that can write bytes.

A nexus for I/O operations.

A channel represents an open connection to an entity such as a hardware device, a file, a network socket, or a program component that is capable of performing one or more distinct I/O operations, for example reading or writing.

A channel is either open or closed. A channel is open upon creation, and once closed it remains closed. Once a channel is closed, any attempt to invoke an I/O operation upon it will cause a ClosedChannelException to be thrown. Whether or not a channel is open may be tested by invoking its isOpen method.

Channels are, in general, intended to be safe for multithreaded access as described in the specifications of the interfaces and classes that extend and implement this interface.

Summary

Inherited methods
From interface java.io.Closeable abstract void close() Closes this stream and releases any system resources associated with it.
From interface java.lang.AutoCloseable abstract void close() Closes this resource, relinquishing any underlying resources.

Public methods

void close ()

boolean isOpen ()