没有写界面，但是主要的代码都已经写出。
- import java.io.*;
- import java.net.*;
- class ChatDemo
- {
- public static void main(String [] args)throws Exception
- {
- DatagramSocket send1 = new DatagramSocket();
- DatagramSocket rece1 = new DatagramSocket(10001);
- new Thread(new send(send1)).start();
- new Thread(new rece(rece1)).start();
- }
- }
- class send implements Runnable
- {
- private DatagramSocket ds;
- public send(DatagramSocket ds)
- {
- this.ds = ds;
- }
- public void run()
- {
- try
- {
- BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));//读取键盘输入
- String line = null;
- while((line = buf.readLine())!=null)//如果不为空，就继续读
- {
- byte [] b = line.getBytes();
- DatagramPacket dp = new DatagramPacket(b,b.length,InetAddress.getByName("192.168.33.1"),10001);//构造数据包，发送到指定主机端口
- ds.send(dp);
- }
- ds.close();
- }
- 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 [] b = new byte[1024*64];
- DatagramPacket dp = new DatagramPacket(b,b.length);//接收发送过来的数据
- ds.receive(dp);
- String ip = dp.getAddress().getHostAddress();//读取IP
- String data = new String(dp.getData(),0,dp.getLength());//读取数据
- System.out.println(ip+":"+data);
- }
- }
- catch (Exception e)
- {
- throw new RuntimeException("接收端失败");
- }
- }
- }
转载：http://blog.csdn.net/chaoyu168/article/details/49867635
