下面的代码为什么会中文乱码呢？求大虾解释 - 黑马程序员技术交流社区

import java.net.*;
import java.io.*;
class send
{
public static void main(String[] args)throws Exception
{
DatagramSocket socket = new DatagramSocket();
BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
String line = null;
while ((line = bufr.readLine()) != null)
{
if(line.equals("over"))
break;
DatagramPacket packet = new DatagramPacket(line.getBytes(),line.length(),InetAddress.getByName("192.168.1.105"),7878);
socket.send(packet);
}
bufr.close();
socket.close();
}
}
class rec
{
public static void main(String[] args)throws Exception
{
DatagramSocket socket = new DatagramSocket(7878);
while (true)
{
byte[] buf = new byte[1024];
DatagramPacket packet = new DatagramPacket
(buf,buf.length);
socket.receive(packet);
String ip = packet.getAddress().getHostAddress();
String data = new String(packet.getData(),0,packet.getLength());
int port = packet.getPort();
System.out.println("from " + ip + " :" + port +"\t" + data );
}
}
}
public class Demo
{
public static void main(String[] args)throws Exception
{
}
}

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