关于UDP和多线程的问题!!

[Linkyo]

请问UDP的多线程怎么实现！！
我想在While语句中不听的监听，在接到数据报后启动一个线程，请问怎么实现！！！

[yuzl32]

发送
import java.net.*;
import java.io.IOException;

public class UDPsend {

public static void main(String[] args){

try{
DatagramSocket ds = new DatagramSocket();
String data = null ;
try{
data = args[0];
}catch(ArrayIndexOutOfBoundsException e)
{
data = "你好 茜儿！\nHello XiEr !";
}

DatagramPacket dp = new DatagramPacket(data.getBytes(),data.length(),InetAddress.getByName("127.0.0.1"),3000);

ds.send(dp);
ds.close();
}
catch(SocketException sException){

System.out.println("the socket could not be opened ");
}
catch(IOException ioE){

System.out.println("I/O error occurs ");
}

}
}

接收
import java.net.*;
import java.io.IOException;

public class UDPrecv {

public static void main(String[] args) {

while(true)
{
try {
DatagramSocket ds = new DatagramSocket(3000);

byte[] buf = new byte[1024];
DatagramPacket dp = new DatagramPacket(buf,buf.length);

ds.receive(dp);
String msg = new String(dp.getData(),0,dp.getLength());
System.out.println( msg + " From :"+dp.getAddress().getHostAddress() + " Port :"+
dp.getPort() );
ds.close();

if (msg.equals("bye"))
break;
}
catch(SocketException sException){

System.out.println("the socket could not be opened ");
}
catch(IOException ioE){

System.out.println("I/O error occurs ");
}
}
}
}

运行:
1) 启动接收
F:\>java UDPrecv
Hello World! From :127.0.0.1 Port :2274
bye From :127.0.0.1 Port :2285

F:\>java UDPrecv
你好 茜儿！
Hello X From :127.0.0.1 Port :2405
bye From :127.0.0.1 Port :2410

F:\>

2) 启动发送
F:\>java UDPsend

F:\>java UDPsend bye

F:\>

输入bye 将退出监听