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## org.apache.commons.net
Interface SocketFactory

All Known Implementing Classes:
  DefaultSocketFactory

public interface SocketFactory

The SocketFactory interface provides a means for the programmer to control the creation of sockets and provide his own Socket implementations for use by all classes derived from `SocketClient`. This allows you to provide your own Socket implementations and to perform security checks or browser capability requests before creating a Socket.

Author:
  Daniel F. Savarese
See Also:
  `DefaultSocketFactory`

Method Summary
`ServerSocket` | `createServerSocket(int port)` Creates a ServerSocket bound to a specified port.
`ServerSocket` | `createServerSocket(int port, int backlog)` Creates a ServerSocket bound to a specified port with a given maximum queue length for incoming connections.
`ServerSocket` | `createServerSocket(int port, int backlog, InetAddress bindAddr)` Creates a ServerSocket bound to a specified port on a given local address with a given maximum queue length for incoming connections.
`Socket` | `createSocket(InetAddress address, int port)` Creates a Socket connected to the given host and port.
`Socket` | `createSocket(InetAddress address, int port, InetAddress localAddr, int localPort)` Creates a Socket connected to the given host and port and originating from the specified local address and port.
`Socket` | `createSocket(String host, int port)` Creates a Socket connected to the given host and port.
`Socket` | `createSocket(String host, int port, InetAddress localAddr, int localPort)` Creates a Socket connected to the given host and port and originating from the specified local address and port.

Method Detail

### createSocket

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

  Creates a Socket connected to the given host and port.

  Parameters:
    `host` - The hostname to connect to.
    `port` - The port to connect to.
  Returns:
    A Socket connected to the given host and port.
  Throws:
    `UnknownHostException` - If the hostname cannot be resolved.
    `IOException` - If an I/O error occurs while creating the Socket.

### createSocket

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

  Creates a Socket connected to the given host and port.

  Parameters:
    `address` - The address of the host to connect to.
    `port` - The port to connect to.
  Returns:
    A Socket connected to the given host and port.
  Throws:
    `IOException` - If an I/O error occurs while creating the Socket.

### createSocket

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

  Creates a Socket connected to the given host and port and originating from the specified local address and port.

  Parameters:
    `host` - The hostname to connect to.
    `port` - The port to connect to.
    `localAddr` - The local address to use.
    `localPort` - The local port to use.
  Returns:
    A Socket connected to the given host and port.
  Throws:
    `UnknownHostException` - If the hostname cannot be resolved.
    `IOException` - If an I/O error occurs while creating the Socket.

### createSocket

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

  Creates a Socket connected to the given host and port and originating from the specified local address and port.

  Parameters:
    `address` - The address of the host to connect to.
    `port` - The port to connect to.
    `localAddr` - The local address to use.
    `localPort` - The local port to use.
  Returns:
    A Socket connected to the given host and port.
  Throws:
    `IOException` - If an I/O error occurs while creating the Socket.

### createServerSocket

    public ServerSocket createServerSocket(int port)
                                    throws IOException

  Creates a ServerSocket bound to a specified port. A port of 0 will create the ServerSocket on a system-determined free port.

  Parameters:
    `port` - The port on which to listen, or 0 to use any free port.
  Returns:
    A ServerSocket that will listen on a specified port.
  Throws:
    `IOException` - If an I/O error occurs while creating the ServerSocket.

### createServerSocket

    public ServerSocket createServerSocket(int port,
                                           int backlog)
                                    throws IOException

  Creates a ServerSocket bound to a specified port with a given maximum queue length for incoming connections. A port of 0 will create the ServerSocket on a system-determined free port.

  Parameters:
    `port` - The port on which to listen, or 0 to use any free port.
    `backlog` - The maximum length of the queue for incoming connections.
  Returns:
    A ServerSocket that will listen on a specified port.
  Throws:
    `IOException` - If an I/O error occurs while creating the ServerSocket.

### createServerSocket

    public ServerSocket createServerSocket(int port,
                                           int backlog,
                                           InetAddress bindAddr)
                                    throws IOException

  Creates a ServerSocket bound to a specified port on a given local address with a given maximum queue length for incoming connections. A port of 0 will create the ServerSocket on a system-determined free port.

  Parameters:
    `port` - The port on which to listen, or 0 to use any free port.
    `backlog` - The maximum length of the queue for incoming connections.
    `bindAddr` - The local address to which the ServerSocket should bind.
  Returns:
    A ServerSocket that will listen on a specified port.
  Throws:
    `IOException` - If an I/O error occurs while creating the ServerSocket.

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