Java 服务器端学习1------聊天程序

import java.net.DatagramSocket;

import java.net.SocketException;

import java.io.*;

import java.net.*;

class SendData implements Runnable{
private DatagramSocket ds;
public SendData(DatagramSocket ds)
{
this.ds=ds;
}

@Override
public void run() {
// TODO Auto-generated method stub
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,Inet4Address.getByName("10.20.1.87"),10002);
ds.send(dp);
}
}
catch(Exception e)
{
throw new RuntimeException("发送端失败！");
}
}

}

class Rece implements Runnable

{
private DatagramSocket ds;
public Rece(DatagramSocket ds)
{
this.ds=ds;
}
@Override
public void run() {
// TODO Auto-generated method stub
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("接受端失败！");
}
}

}

public class ChatDemo {

/**
* @param args
* @throws SocketException 
*/
public static void main(String[] args) throws SocketException {
// TODO Auto-generated method stub
DatagramSocket sendSocket=new DatagramSocket();
DatagramSocket receSocket=new DatagramSocket(10002);
new Thread(new SendData(sendSocket)).start();
new Thread(new Rece(receSocket)).start();
}

}