<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> ?1 ? import ?java.net. * ;
?2 ?
?3 ? public ? class ?UdpRecv
?4 ? {
?5 ? ???? public ? static ? void ?main(String?args[])? throws ?Exception
?6 ? ????{
?7 ? ????????DatagramSocket?ds? = ? new ?DatagramSocket( 3000 );
?8 ? ???????? byte ?[]?buf? = ? new ? byte [ 1024 ];
?9 ? ????????DatagramPacket?dp? = ? new ?DatagramPacket(buf, 1024 );
10 ? ????????ds.receive(dp);
11 ? ????????String?strRecv? = ? new ?String?(dp.getData(), 0 ,dp.getLength(), " gb2312 " ) + " ?from? " + dp.getAddress().getHostAddress()? + ? " : " + dp.getPort();
12 ? ????????System.out.println(strRecv);
13 ? ????????ds.close();
14 ? ????}
15 ? ????
16 ? }

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> ?1 ? import ?java.net. * ;
?2 ?
?3 ? public ? class ?UdpSend
?4 ? {
?5 ? ???? public ? static ? void ?main(String?args[]) throws ?Exception
?6 ? ????{
?7 ? ????????DatagramSocket?ds? = ? new ?DatagramSocket();
?8 ? ????????String?str? = ? " hello?,this?is?a?test " ;
?9 ? ????????DatagramPacket?dp? = ? new ?DatagramPacket?(str.getBytes(),str.length(),InetAddress.getByName( " 127.0.0.1 " ), 3000 );
10 ? ????????ds.send(dp);
11 ? ????????ds.close();
12 ? ????}
13 ?
14 ? }