Package javax.net

Class SocketFactory

java.lang.Object

javax.net.SocketFactory

Direct Known Subclasses:

SSLSocketFactory

public abstract class SocketFactory
extends Object

This abstract class defines methods to create sockets. It can be subclassed to create specific socket types with additional socket-level functionality.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SocketFactory()	Creates a new SocketFactory instance.

Method Summary

Modifier and Type	Method	Description
Socket	createSocket()	Creates a new socket which is not connected to any remote host.
abstract Socket	createSocket(String host, int port)	Creates a new socket which is connected to the remote host specified by the parameters host and port.
abstract Socket	createSocket(String host, int port, InetAddress localHost, int localPort)	Creates a new socket which is connected to the remote host specified by the parameters host and port.
abstract Socket	createSocket(InetAddress host, int port)	Creates a new socket which is connected to the remote host specified by the InetAddress host.
abstract Socket	createSocket(InetAddress address, int port, InetAddress localAddress, int localPort)	Creates a new socket which is connected to the remote host specified by the InetAddress address.
static SocketFactory	getDefault()	Gets the default socket factory of the system which can be used to create new sockets without creating a subclass of this factory.
static void	setDefault(SocketFactory socketFactory)	Set the default socket factory.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SocketFactory

protected SocketFactory()

Creates a new SocketFactory instance.

Method Detail

getDefault

public static SocketFactory getDefault()

Gets the default socket factory of the system which can be used to create new sockets without creating a subclass of this factory.

Returns:

the system default socket factory.

setDefault

public static void setDefault(SocketFactory socketFactory)

Set the default socket factory. For use in tests.

createSocket

public Socket createSocket()
                    throws IOException

Creates a new socket which is not connected to any remote host. This method has to be overridden by a subclass otherwise a SocketException is thrown.

Returns:

the created unconnected socket.

Throws:

IOException - if an error occurs while creating a new socket.

createSocket

public abstract Socket createSocket(String host,
                                    int port)
                             throws IOException,
                                    UnknownHostException

Creates a new socket which is connected to the remote host specified by the parameters host and port. The socket is bound to any available local address and port.

Parameters:

host - the remote host address the socket has to be connected to.

port - the port number of the remote host at which the socket is connected.

Returns:

the created connected socket.

Throws:

IOException - if an error occurs while creating a new socket.

UnknownHostException - if the specified host is unknown or the IP address could not be resolved.

createSocket

public abstract Socket createSocket(String host,
                                    int port,
                                    InetAddress localHost,
                                    int localPort)
                             throws IOException,
                                    UnknownHostException

Creates a new socket which is connected to the remote host specified by the parameters host and port. The socket is bound to the local network interface specified by the InetAddress localHost on port localPort.

Parameters:

host - the remote host address the socket has to be connected to.

port - the port number of the remote host at which the socket is connected.

localHost - the local host address the socket is bound to.

localPort - the port number of the local host at which the socket is bound.

Returns:

the created connected socket.

Throws:

IOException - if an error occurs while creating a new socket.

UnknownHostException - if the specified host is unknown or the IP address could not be resolved.

createSocket

public abstract Socket createSocket(InetAddress host,
                                    int port)
                             throws IOException

Creates a new socket which is connected to the remote host specified by the InetAddress host. The socket is bound to any available local address and port.

Parameters:

host - the host address the socket has to be connected to.

port - the port number of the remote host at which the socket is connected.

Returns:

the created connected socket.

Throws:

IOException - if an error occurs while creating a new socket.

createSocket

public abstract Socket createSocket(InetAddress address,
                                    int port,
                                    InetAddress localAddress,
                                    int localPort)
                             throws IOException

Creates a new socket which is connected to the remote host specified by the InetAddress address. The socket is bound to the local network interface specified by the InetAddress localHost on port localPort.

Parameters:

address - the remote host address the socket has to be connected to.

port - the port number of the remote host at which the socket is connected.

localAddress - the local host address the socket is bound to.

localPort - the port number of the local host at which the socket is bound.

Returns:

the created connected socket.

Throws:

IOException - if an error occurs while creating a new socket.