View difference between Paste ID: hz6eCCqN and

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+package udps;
 
 import java.io.IOException;
 import java.net.DatagramPacket;
 import java.net.DatagramSocket;
 import java.net.SocketException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
 public class UDPServer {
 
     public static void main(String[] args) {
         UDPServer server = new UDPServer();
         server.init();
     }
 
     public void init() {
         Thread serverThread = new Thread(new Server());
         serverThread.start();
     }
 
     public class Server implements Runnable {
 
         public void run() {
             DatagramSocket socket = null;
 
             try {
                 socket = new DatagramSocket(7777);
             } catch (SocketException ex) {
                 Logger.getLogger(UDPServer.class.getName()).log(Level.SEVERE, null, ex);
             }
 
             ExecutorService pool = Executors.newFixedThreadPool(32);
 
             for (;;) {
                 DatagramPacket packet = new DatagramPacket(new byte[1024], 1024);
 
                 try {
                     socket.receive(packet);
                 } catch (IOException ex) {
                     Logger.getLogger(UDPServer.class.getName()).log(Level.SEVERE, null, ex);
                 }
 
                 pool.execute(new Responder(socket, packet));
             }
         }
     }
 
     public class Responder implements Runnable {
 
         DatagramSocket socket = null;
         DatagramPacket packet = null;
 
         public Responder(DatagramSocket socket, DatagramPacket packet) {
             this.socket = socket;
             this.packet = packet;
         }
 
         public void run() {
             byte[] data = "PONG".getBytes();
 
             DatagramPacket response = new DatagramPacket(data, data.length, packet.getAddress(), packet.getPort());
 
             System.out.println(packet.getData().toString());
 
             try {
                 socket.send(response);
             } catch (IOException ex) {
                 Logger.getLogger(UDPServer.class.getName()).log(Level.SEVERE, null, ex);
             }
         }
     }
 }