Contoh Socket UDP di Java

Class ClientDatagram
=========================================================================

/*
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 * and open the template in the editor.
 */
package udpdatagram;

/**
 *
 * @author MAHASISWA PU
 */
import java.net.*;
import java.io.*;
public class ClientDatagram {
    public static DatagramSocket d;
    public static DatagramPacket p;
    public static byte buffer[] = new byte [1024];
    public static BufferedReader dis;
    public static int clientport = 800, serverport = 900;
   
   
    public static void main(String args[]) throws IOException {
       
        d= new DatagramSocket (clientport);
        //BufferedReader dis = new BufferedReader (new InputStreamReader (System.in));
        dis = new BufferedReader (new InputStreamReader (System.in));
        p = new DatagramPacket (buffer,buffer.length);
        //System.out.println("Client sedang menunggu server mengirimkan data...");
        InetAddress i =  InetAddress.getByName("localhost");
       
        while (true)
        {
            //System.out.print("Masukkan pesan anda :");
            //System.out.print("Masukkan pesan anda :");
            //DatagramPacket p = new DatagramPacket (buffer,buffer.length);
            //d.receive(p);
            //System.out.print(p);
            System.out.print("Masukkan pesan anda :");
            String ps = new String (dis.readLine());
            //System.out.println("Server : "+ps+"\n");
            buffer = ps.getBytes();
            //System.out.println("Server : ");
            //System.out.println(ps);
            //System.out.println("\n");
           
            //String str = dis.readLine();
            if((ps==null || ps.equals ("end")))
            {
               d.send (new DatagramPacket(buffer,ps.length(),i,serverport));
               break;
            }
           
            //buffer =str.getBytes();
            d.send (new DatagramPacket(buffer,ps.length(),i,serverport));
            d.receive(p);
            String ps2 = new String(p.getData(),0,p.getLength());
            System.out.println("Pesan dari server : " +ps2+"\n");
        }
        
    }
   
}

========================================================================
Class ServerDatagram

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package udpdatagram;

/**
 *
 * @author MAHASISWA PU
 */
import java.net.*;
import java.io.*;
public class ServerDatagram {
    public static DatagramSocket ds;
    public static DatagramPacket p;
    public static BufferedReader dis;
    public static byte buffer[] = new byte [1024];
    public static int clientport = 800, serverport = 900;

    /**
     * @param args the command line arguments
     */
    //public static byte buffer[] = new byte [10];
    public static void main(String[] args) throws IOException {
        // TODO code application logic here
       
        //byte buffer[] = new byte [100];
        ds = new DatagramSocket (serverport);
        p = new DatagramPacket (buffer,buffer.length);
        dis = new BufferedReader (new InputStreamReader (System.in));
        //BufferedReader dis = new BufferedReader (new InputStreamReader (System.in));
        InetAddress i =  InetAddress.getByName("localhost");
        System.out.println("Menuggu pesan dari client,...");
        while (true)
        {
       
            //byte buffer[] = new byte [65535];
            //InetAddress i =  InetAddress.getByName("localhost");
            // System.out.print("Masukkan pesan anda :");
            ds.receive(p);
            //String str = dis.readLine();
            String str = new String(p.getData(),0,p.getLength());
            if((str==null || str.equals ("end")))
            {
               break;
            }
            //buffer =str.getBytes();
     
            //ds.send (new DatagramPacket(buffer,str.length(),i,clientport));
            //DatagramPacket p = new DatagramPacket (buffer,buffer.length);
            //ds.receive(p);
            System.out.println("Pesan dari client : " +str+"\n");
            System.out.print("Masukkan pesan anda :");
            String ps = new String (dis.readLine());
            buffer =ps.getBytes();
            //System.out.print("Masukkan pesan anda :");
            ds.send(new DatagramPacket(buffer,ps.length(),i,clientport));
            //String ps = new String (p.getData(),0,p.getLength());
            //System.out.println("test");
            //System.out.println("Client : ");
            //System.out.println(ps);
            //System.out.println("\n");
           
           
           
            }
    }
}