host ::== host name or IP address (omitted for inbound connections)
port ::== numeric port number (omitted for system assigned port)
例子:
"datagram://" - server with system assigned port
"datagram://:7" - server with specified port
"datagram://java.sun.com:80" - client
JSR 75 PDA Optional Packages
查询方式: System.getProperty( "microedition.io.file.FileConnection.version" ).equals( "1.0" );
接口: javax.microedition.io.file.FileConnection ，扩展了StreamConnection
定义: IETF RFC 1738, Section 3.10 Files
例子:
"file:///CFCard/music/thewayup/opening.mp3"
