Interface NetworkChannel

All Superinterfaces:
AutoCloseable, Channel, Closeable
All Known Subinterfaces:
MulticastChannel
All Known Implementing Classes:
AsynchronousServerSocketChannel, AsynchronousSocketChannel, DatagramChannel, ServerSocketChannel, SocketChannel 
public interface NetworkChannel
extends Channel

A channel to a network socket.

A channel that implements this interface is a channel to a network socket. The bind method is used to bind the socket to a local address, the getLocalAddress method returns the address that the socket is bound to, and the setOption and getOption methods are used to set and query socket options. An implementation of this interface should specify the socket options that it supports.

The bind and setOption methods that do not otherwise have a value to return are specified to return the network channel upon which they are invoked. This allows method invocations to be chained. Implementations of this interface should specialize the return type so that method invocations on the implementation class can be chained.

Since:
1.7

Methods

Modifier and Type Method Description
NetworkChannel bind​(SocketAddress local)

Binds the channel's socket to a local address.
SocketAddress getLocalAddress()

Returns the socket address that this channel's socket is bound to.
<T> T getOption​(SocketOption<T> name)

Returns the value of a socket option.
<T> NetworkChannel setOption​(SocketOption<T> name, T value)

Sets the value of a socket option.
Set<SocketOption<?>> supportedOptions()

Returns a set of the socket options supported by this channel.

Methods declared in interface java.nio.channels.Channel

close, isOpen

Methods

bind

NetworkChannel bind(SocketAddress local)
             throws IOException

Binds the channel's socket to a local address.

This method is used to establish an association between the socket and a local address. Once an association is established then the socket remains bound until the channel is closed. If the local parameter has the value null then the socket will be bound to an address that is assigned automatically.

Parameters:
local - The address to bind the socket, or null to bind the socket to an automatically assigned socket address
Returns:
This channel
Throws:
AlreadyBoundException - If the socket is already bound
UnsupportedAddressTypeException - If the type of the given address is not supported
ClosedChannelException - If the channel is closed
IOException - If some other I/O error occurs
SecurityException - If a security manager is installed and it denies an unspecified permission. An implementation of this interface should specify any required permissions.
See Also:
getLocalAddress()

getLocalAddress

SocketAddress getLocalAddress()
                       throws IOException

Returns the socket address that this channel's socket is bound to.

Where the channel is bound to an Internet Protocol socket address then the return value from this method is of type InetSocketAddress.

Returns:
The socket address that the socket is bound to, or null if the channel's socket is not bound
Throws:
ClosedChannelException - If the channel is closed
IOException - If an I/O error occurs

setOption

<T> NetworkChannel setOption(SocketOption<T> name,
                             T value)
                      throws IOException

Sets the value of a socket option.

Type Parameters:
T - The type of the socket option value
Parameters:
name - The socket option
value - The value of the socket option. A value of null may be a valid value for some socket options.
Returns:
This channel
Throws:
UnsupportedOperationException - If the socket option is not supported by this channel
IllegalArgumentException - If the value is not a valid value for this socket option
ClosedChannelException - If this channel is closed
IOException - If an I/O error occurs
See Also:
StandardSocketOptions

getOption

<T> T getOption(SocketOption<T> name)
         throws IOException

Returns the value of a socket option.

Type Parameters:
T - The type of the socket option value
Parameters:
name - The socket option
Returns:
The value of the socket option. A value of null may be a valid value for some socket options.
Throws:
UnsupportedOperationException - If the socket option is not supported by this channel
ClosedChannelException - If this channel is closed
IOException - If an I/O error occurs
See Also:
StandardSocketOptions

supportedOptions

Set<SocketOption<?>> supportedOptions()

Returns a set of the socket options supported by this channel.

This method will continue to return the set of options even after the channel has been closed.

Returns:
A set of the socket options supported by this channel

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https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/channels/NetworkChannel.html