UDP Server Socket using Java

The following simple example shows how to open a UDP server socket using Java. The code receives strings from a UDP socket and print them in the standard output.

import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.DatagramPacket;

public class SimpleUDPSSocket extends Thread
{
 public SimpleUDPSSocket() throws Exception
 {
   _dSocket = new DatagramSocket(PORT);
   _running = false;
 }

 public void run()
 {
   byte buf[] = new byte[MAX_SIZE];
   DatagramPacket packet = new DatagramPacket (buf, buf.length);
   String data;
   _running = true;
   while (_running) {
     try {
       _dSocket.receive (packet);
     }
     catch (Exception ex) {
       _running = false;
       break;
     }
     data = new String(packet.getData(), 0, packet.getLength());
     System.out.println (data);
   }
 }

 private DatagramSocket _dSocket;
 private boolean _running;
 private static final int PORT = 4444;
 private static final int MAX_SIZE = 64;
}