import java.io.*;
import java.net.*;
class Send implements Runnable
{
private DatagramSocket ds;
public Send (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("bye".equals(line))
break;
byte[] buf = line.getBytes();
DatagramPacket dp = new DatagramPacket(buf,buf.length,InetAddress.getByName("IP地址"),4353);
ds.send(dp);
}
}
catch(Exception e)
{
throw new RuntimeException("发送失败");
}
}
}
class Rece implements Runnable
{
private DatagramSocket ds;
public Rece (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("接收失败");
}
}
}
class ChatTest
{
public static void main(String[] args) throws Exception
{
DatagramSocket sendSocket = new DatagramSocket();
DatagramSocket receSocket = new DatagramSocket(4353);
new Thread(new Send(sendSocket)).start();
new Thread(new Rece(receSocket)).start();
}
}
java实现UDP聊天---转载
原文：http://www.cnblogs.com/kevinfuture/p/4275319.html
