- /*
- 编写聊天程序。
- 有收数据的部分和发数据的部分。
- 这两部分需要同时执行。
- 那就需要用到多线程技术。
- 因为收和发动作是不一致的,所以要定义两个run方法。
- 而且这两个方法要封装到不同的类中。
- */
- 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 ("886".equals(line))
- {
- break;
- }
- byte[] buf= line.getBytes();
- DatagramPacket dp =
- new DatagramPacket(buf,buf.length,InetAddress.getByName("222.199.193.2"),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;
- }
- 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");
- }
-
- }
- }
- class ChatDemo
- {
- public static void main(String[] args) throws Exception
- {
- DatagramSocket sendSocket = new DatagramSocket();
- DatagramSocket receSocket = new DatagramSocket(10002);
- new Thread(new Send(sendSocket)).start();
- new Thread(new Rece(receSocket)).start();
- }
- }
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