DatagramSocket - 黑马程序员技术交流社区

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
/**socket聊天程序
* @author Administrator
*
*/
public class datagramSocketDemo {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
sendDemo send = new sendDemo(new DatagramSocket());//发送端
new Thread(send).start();
receDemo rece = new receDemo(new DatagramSocket(10011));//接收端
new Thread(rece).start();
}
}
class sendDemo implements Runnable{
DatagramSocket ds = null;
sendDemo(DatagramSocket ds){
this.ds = ds;
}
public void run(){
BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
String s = null;
try {
while((s=buf.readLine())!=null){
if(s.equals("886"))
break;
byte[]by = s.getBytes();
DatagramPacket dp = new DatagramPacket(by, by.length,InetAddress.getByName("192.168.3.102"),10011);
ds.send(dp);
}
ds.close();
buf.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
class receDemo implements Runnable{
DatagramSocket ds =null;
public receDemo(DatagramSocket ds) {
this.ds = ds;
}
public void run(){
while(true){
byte[]by = new byte[1024];
DatagramPacket dp = new DatagramPacket(by,0,by.length);
try {
ds.receive(dp);
String data = new String(dp.getData(),0,dp.getLength());
String ip = dp.getAddress().getHostAddress();
System.out.println(ip+" : "+data);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

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