//UDPLocalClient1.java
import java.io.*;
import java.net.*;

public class UDPLocalClient1
{
    public static void main(String args[])
    {
        DatagramSocket udpSock = null;
        int port = 7777;
        String strRead;

        BufferedReader inStream = new BufferedReader(new InputStreamReader(System.in));

        try
        {
            udpSock = new DatagramSocket();
            InetAddress host = InetAddress.getByName("localhost");
            while(true)
            {
                //take input and send the packet
                echo("Enter Your messages : ");
                strRead = (String)inStream.readLine();
                byte[] dsByte = strRead.getBytes();
                DatagramPacket  dp =
                new DatagramPacket(dsByte,dsByte.length,host,port);
                udpSock.send(dp);
                //buffer to receive incoming data
                byte[] buffer = new byte[65536];
                DatagramPacket reply =
                new DatagramPacket(buffer, buffer.length);
                udpSock.receive(reply);
                byte[] data = reply.getData();
                strRead = new String(data, 0, reply.getLength());
                //echo the details of from the server
                echo(reply.getAddress().getHostAddress()
                + " : " + reply.getPort() + " - " + strRead);
            }
        }

        catch(IOException e)
        {
            System.err.println("IOException " + e);
        }
    }

    //simple function to echo data to terminal
    public static void echo(String msg)
    {
        System.out.println(msg);
    }
}