Send message using Socket - Java Network

Java examples for Network:Socket

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Description

Send message using Socket

Demo Code


import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;

public class Sender {
  Socket sender;// w  ww.jav a  2s .  c  om
  ObjectOutputStream out;
  ObjectInputStream in;
  String packet, ack, str, msg;
  int n, i = 0, sequence = 0;

  Sender() {
  }

  public void run() {
    try {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      System.out.println("Waiting for Connection....");
      sender = new Socket("localhost", 2005);
      sequence = 0;
      out = new ObjectOutputStream(sender.getOutputStream());
      out.flush();
      in = new ObjectInputStream(sender.getInputStream());
      str = (String) in.readObject();
      System.out.println("reciver     > " + str);
      System.out.println("Enter the data to send....");
      packet = br.readLine();
      n = packet.length();
      do {
        try {

          if (i < n) {
            msg = String.valueOf(sequence);
            msg = msg.concat(packet.substring(i, i + 1));
          } else if (i == n) {
            msg = "end";
            out.writeObject(msg);
            break;
          }
          out.writeObject(msg);
          sequence = (sequence == 0) ? 1 : 0;
          out.flush();
          System.out.println("data sent>" + msg);
          ack = (String) in.readObject();
          System.out.println("waiting for ack.....\n\n");
          if (ack.equals(String.valueOf(sequence))) {
            i++;
            System.out.println("receiver   >  " + " packet recieved\n\n");
          } else {
            System.out.println("Time out resending data....\n\n");
            sequence = (sequence == 0) ? 1 : 0;
          }
        } catch (Exception e) {
        }
      } while (i < n + 1);
      System.out.println("All data sent. exiting.");
    } catch (Exception e) {
    } finally {
      try {
        in.close();
        out.close();
        sender.close();
      } catch (Exception e) {
      }
    }
  }

  public static void main(String args[]) {
    Sender s = new Sender();
    s.run();
  }
}

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