- import java.io.*;
- import java.net.*;
- class Send implements Runnable
- {
- private DatagramSocket ds;
- public Send(DatagramSocket ds)//发送的时候要用哪一个socket不确定,所以在发送端在构造时就传一个指定的socket进来
- {
- this.ds = ds;
- }
- public void run()
- {
- try//请问这里为什么不抛出异常而是选择了处理异常?
- {
- BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
- String line = null;
- while((line=bufr.readLine())!=null)
- {
- byte[] buf = line.getBytes();
- DatagramPacket dp =
- new DatagramPacket(buf,buf.length,InetAddress.getByName("192.168.1.255"),10002);
- ds.send(dp);
- if("886".equals(line))
- break;
- }
- }
- 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//<span style="line-height: 30.7999992370605px;">请问这里为什么不抛出异常而是选择了处理异常?</span>
- {
- 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());
- if("886".equals(data))
- {
- System.out.println(ip+"....离开聊天室");
- break;
- }
- 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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