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为什么接收端开着，发送端发送数据，接收端确无法

package com.itheima.net;
import java.net.*;
public class UDPSend {
public static void main(String[] args) {
// TODO Auto-generated method stub
try {
send();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void send() throws Exception{
//建立UDPSocket服务。
DatagramSocket ds = new DatagramSocket();
//提供数据，打包。
byte[] buf = "hello,word".getBytes();
DatagramPacket dp = new DatagramPacket(buf,buf.length,InetAddress.getByName("192.168.1.2"),10000);
//数据发送。
ds.send(dp);
//关闭资源
ds.close();
}
}
<DIV class=blockcode>
<BLOCKQUOTE>import java.net.*;
class UDPReceive {
public static void main(String[] args) {
// TODO Auto-generated method stub
try {
receive();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void receive() throws Exception{
DatagramSocket ds = new DatagramSocket(10000);
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());
int port = dp.getPort();
System.out.println("ip:"+ip);
System.out.println("data:"+data);
System.out.println("port:"+port);}
// ds.close();
}
}

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接收数据？

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