ChatDemo

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;

/**
 * 编写一个聊天程序。
 * 有收数据和发数据
 * 这两部分要同时执行，多线程技术，因为收和发是不一致的，所以要定义两个run方法，而且这两个方法要封装到不同类中
 *
 * @author Administrator
 *
 */
public class Send implements Runnable{
 private DatagramSocket ds;
 public Send(DatagramSocket ds){
  this.ds=ds;
 }
 @Override
 public void run() {
  
  try {
    ds=new DatagramSocket();
   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("172.0.0.1"),1003);
    ds.send(dp);
   }
  } catch (Exception e) {
  }
 }

}
class Rece implements Runnable{
 private DatagramSocket ds;
 public Rece(DatagramSocket ds){
  this.ds=ds;
 }
 @Override
 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) {
   // TODO: handle exception
  }
 }
}
class ChatDemo{
 public static void main(String[] args) throws Exception {
 DatagramSocket sendSocket=new DatagramSocket();
 DatagramSocket receSocket=new DatagramSocket(1003);
 new Thread((Runnable)sendSocket).start();
 new Thread((Runnable) receSocket).start();
 }
}