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Added in API level 1

SocketFactory

public abstract class SocketFactory
extends Object

java.lang.Object
   ↳ javax.net.SocketFactory
Known Direct Subclasses
Known Indirect Subclasses


This class creates sockets. It may be subclassed by other factories, which create particular subclasses of sockets and thus provide a general framework for the addition of public socket-level functionality.

Socket factories are a simple way to capture a variety of policies related to the sockets being constructed, producing such sockets in a way which does not require special configuration of the code which asks for the sockets:

Factory classes are specified by environment-specific configuration mechanisms. For example, the getDefault method could return a factory that was appropriate for a particular user or applet, and a framework could use a factory customized to its own purposes.

See also:

Summary

Protected constructors

SocketFactory()

Creates a SocketFactory.

Public methods

abstract Socket createSocket(String host, int port)

Creates a socket and connects it to the specified remote host at the specified remote port.

abstract Socket createSocket(InetAddress host, int port)

Creates a socket and connects it to the specified port number at the specified address.

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

Creates a socket and connect it to the specified remote address on the specified remote port.

abstract Socket createSocket(String host, int port, InetAddress localHost, int localPort)

Creates a socket and connects it to the specified remote host on the specified remote port.

Socket createSocket()

Creates an unconnected socket.

static SocketFactory getDefault()

Returns a copy of the environment's default socket factory.

Inherited methods

From class java.lang.Object

Protected constructors

SocketFactory

Added in API level 1
SocketFactory ()

Creates a SocketFactory.

Public methods

createSocket

Added in API level 1
Socket createSocket (String host, 
                int port)

Creates a socket and connects it to the specified remote host at the specified remote port. This socket is configured using the socket options established for this factory.

If there is a security manager, its checkConnect method is called with the host address and port as its arguments. This could result in a SecurityException.

Parameters
host String: the server host name with which to connect, or null for the loopback address.
port int: the server port
Returns
Socket the Socket
Throws
IOException if an I/O error occurs when creating the socket
SecurityException if a security manager exists and its checkConnect method doesn't allow the operation.
UnknownHostException if the host is not known
IllegalArgumentException if the port parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.

See also:

createSocket

Added in API level 1
Socket createSocket (InetAddress host, 
                int port)

Creates a socket and connects it to the specified port number at the specified address. This socket is configured using the socket options established for this factory.

If there is a security manager, its checkConnect method is called with the host address and port as its arguments. This could result in a SecurityException.

Parameters
host InetAddress: the server host
port int: the server port
Returns
Socket the Socket
Throws
IOException if an I/O error occurs when creating the socket
SecurityException if a security manager exists and its checkConnect method doesn't allow the operation.
IllegalArgumentException if the port parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.
NullPointerException if host is null.

See also:

createSocket

Added in API level 1
Socket createSocket (InetAddress address, 
                int port, 
                InetAddress localAddress, 
                int localPort)

Creates a socket and connect it to the specified remote address on the specified remote port. The socket will also be bound to the local address and port suplied. The socket is configured using the socket options established for this factory.

If there is a security manager, its checkConnect method is called with the host address and port as its arguments. This could result in a SecurityException.

Parameters
address InetAddress: the server network address
port int: the server port
localAddress InetAddress: the client network address
localPort int: the client port
Returns
Socket the Socket
Throws
IOException if an I/O error occurs when creating the socket
SecurityException if a security manager exists and its checkConnect method doesn't allow the operation.
IllegalArgumentException if the port parameter or localPort parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.
NullPointerException if address is null.

See also:

createSocket

Added in API level 1
Socket createSocket (String host, 
                int port, 
                InetAddress localHost, 
                int localPort)

Creates a socket and connects it to the specified remote host on the specified remote port. The socket will also be bound to the local address and port supplied. This socket is configured using the socket options established for this factory.

If there is a security manager, its checkConnect method is called with the host address and port as its arguments. This could result in a SecurityException.

Parameters
host String: the server host name with which to connect, or null for the loopback address.
port int: the server port
localHost InetAddress: the local address the socket is bound to
localPort int: the local port the socket is bound to
Returns
Socket the Socket
Throws
IOException if an I/O error occurs when creating the socket
SecurityException if a security manager exists and its checkConnect method doesn't allow the operation.
UnknownHostException if the host is not known
IllegalArgumentException if the port parameter or localPort parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.

See also:

createSocket

Added in API level 1
Socket createSocket ()

Creates an unconnected socket.

Returns
Socket the unconnected socket
Throws
IOException if the socket cannot be created

See also:

getDefault

Added in API level 1
SocketFactory getDefault ()

Returns a copy of the environment's default socket factory.

Returns
SocketFactory the default SocketFactory
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