The following static methods to set the system-wide socket implementation factories have been deprecated:
- `static void ServerSocket.setSocketFactory���(SocketImplFactory fac)`
- `static void Socket.setSocketImplFactory���(SocketImplFactory fac)`
- `static void DatagramSocket.setDatagramSocketImplFactory���(DatagramSocketImplFactory fac)`
These API points were used to statically configure a system-wide factory for the corresponding socket types in the `java.net` package. These methods have mostly been obsolete since Java 1.4.