url ::== "socket://" hostport
hostport ::== host ":" port
host ::== host name or IP address (omitted for inbound connections)
port ::== numeric port number
例子:
"socket://developer.sun.com/techtopics/mobility:80"
"socket://www.sun.com:53"
--------------------------------------------------------------------------------
Datagram Connection
支持: 推荐
接口: javax.microedition.io.UDPDatagram.Connection ，扩展了DatagramConnection
BNF:
url ::== "datagram://" | "datagram://" hostport
hostport ::== host ":" port
