求教：关于UDP聊天程序 - 黑马程序员技术交流社区

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
public class Socket{
public static void main(String[] args) throws SocketException {
DatagramSocket send = new DatagramSocket();
DatagramSocket rece = new DatagramSocket(11011);
new Thread(new SendSocket(send)).start();
new Thread(new ReceSocket(rece)).start();
}
}
class SendSocket implements Runnable {
DatagramSocket ds;
SendSocket(DatagramSocket ds){
this.ds = ds;
}
public void run(){
try {
BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
String line = null;
while((line =bufr.readLine())!= null){
if("886".equals(line))
break;
byte [] buf = line.getBytes();
DatagramPacket dp = new DatagramPacket(buf, buf.length,InetAddress.getByName("172.17.55.107"),11011);
ds.send(dp);
}
}
catch (Exception e) {
throw new RuntimeException("发送端失败");
}
finally {
ds.close();
}
}
}
class ReceSocket implements Runnable{
DatagramSocket ds;
ReceSocket(DatagramSocket ds){
this.ds = ds;
}
public void run(){
try {
while(true){
byte [] buf = new byte [1024];
DatagramPacket dp = new DatagramPacket(buf, buf.length);
ds.receive(dp);
String ip = dp.getAddress().getHostAddress();
String data = new String(dp.getData(),0,dp.getLength());
System.out.println(ip+"..."+data);
}
} catch (Exception e) {
throw new RuntimeException("接收端失败");
}
}
}

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