【Java开源代码栏目提醒】:网学会员为广大网友收集整理了,UDPEchoServer.java,希望对大家有所帮助!
import java.net.*;
import java.io.*;
public class UDPEchoServer
{
public static void main(String args[])
{
int port = Integer.parseInt(args[0]);
try
{
DatagramSocket srv = new DatagramSocket(port);
System.err.println("Echo server start at port: "+port);
while (true)
{
byte[] buffer = new byte[256];
DatagramPacket packet = new DatagramPacket(buffer,256);
srv.receive(packet);
InetAddress clnt = packet.getAddress();
int clnt_port =packet.getPort();
System.out.println("Client connect from: "+clnt+" #"+clnt_port);
String str = new String(packet.getData());
System.out.println("Message from client : "+str);
String send = str.toUpperCase();
buffer = send.getBytes();
packet = null;
packet = new DatagramPacket(buffer, buffer.length, clnt, clnt_port);
srv.send(packet);
}
}
catch(SocketException se)
{
System.err.println(se);
}
catch(IOException ioe)
{
System.err.println(ioe);
}
}
}
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