question: public ModbusUDPListener ( ) { try { address = InetAddress . getByAddress ( new byte [ ] { 0 , 0 , 0 , 0 } ) ; } catch ( UnknownHostException e ) { } }
target:  Constructs a new ModbusUDPListener instance. The address will be set to a default value of the wildcard local address and the default Modbus port.