# Interface RMIServerSocketFactory

All Known Implementing Classes:
  `RMISocketFactory, SslRMIServerSocketFactory`

public interface RMIServerSocketFactory
An `RMIServerSocketFactory` instance is used by the RMI runtime in order to obtain server sockets for RMI calls. A remote object can be associated with an `RMIServerSocketFactory` when it is created/exported via the constructors or `exportObject` methods of `java.rmi.server.UnicastRemoteObject`.

An `RMIServerSocketFactory` instance associated with a remote object is used to obtain the `ServerSocket` used to accept incoming calls from clients.

An `RMIServerSocketFactory` instance can also be associated with a remote object registry so that clients can use custom socket communication with a remote object registry.

An implementation of this interface should implement `Object.equals(Object)` to return `true` when passed an instance that represents the same (functionally equivalent) server socket factory, and `false` otherwise (and it should also implement `Object.hashCode()` consistently with its `Object.equals` implementation).

Since:
  1.2
See Also:
  - `UnicastRemoteObject`
  - `LocateRegistry`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `ServerSocket`
  `createServerSocket(int port)`
  Create a server socket on the specified port (port 0 indicates an anonymous port).

- ## Method Details

  - ### createServerSocket

    ServerSocket createServerSocket(int port) throws IOException
    Create a server socket on the specified port (port 0 indicates an anonymous port).
    Parameters:
      `port` - the port number
    Returns:
      the server socket on the specified port
    Throws:
      `IOException` - if an I/O error occurs during server socket creation
    Since:
      1.2