Using Thread to handle Socket Server - Java Network

Java examples for Network:TCP

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Description

Using Thread to handle Socket Server

Demo Code

import java.io.*;
import java.net.*;
import java.lang.*;

public class Server {
     public static void main(String[] args) throws IOException {
          final int port = 444;
          System.out.println("Server waiting for connection on port "+port);
          ServerSocket ss = new ServerSocket(port);
          Socket clientSocket = ss.accept();
          System.out.println("Recieved connection from "+clientSocket.getInetAddress()+" on port "+clientSocket.getPort());
          //create two threads to send and recieve from client
          RecieveFromClientThread recieve = new RecieveFromClientThread(clientSocket);
          Thread thread = new Thread(recieve);
          thread.start();/*  w w  w .j  ava2s .c  o m*/
          SendToClientThread send = new SendToClientThread(clientSocket);
          Thread thread2 = new Thread(send);
          thread2.start();
     }
}

class RecieveFromClientThread implements Runnable
{
     Socket clientSocket=null;
     BufferedReader brBufferedReader = null;

     public RecieveFromClientThread(Socket clientSocket)
     {
          this.clientSocket = clientSocket;
     }//end constructor
     public void run() {
          try{
          brBufferedReader = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));

          String messageString;
          while(true){
          while((messageString = brBufferedReader.readLine())!= null){//assign message from client to messageString
               if(messageString.equals("EXIT"))
               {
                    break;//break to close socket if EXIT
               }
               System.out.println("From Client: " + messageString);//print the message from client
               System.out.println("Please enter something to send back to client..");
          }
          this.clientSocket.close();
          System.exit(0);
     }

     }
     catch(Exception ex){System.out.println(ex.getMessage());}
     }
}//end class RecieveFromClientThread

class SendToClientThread implements Runnable
{
     PrintWriter pwPrintWriter;
     Socket clientSock = null;

     public SendToClientThread(Socket clientSock) {
          this.clientSock = clientSock;
     }

     public void run() {
          try{
          pwPrintWriter =new PrintWriter(new OutputStreamWriter(this.clientSock.getOutputStream()));//get outputstream

          while(true) {
               String msgToClientString = null;
               BufferedReader input = new BufferedReader(new InputStreamReader(System.in));//get userinput

               msgToClientString = input.readLine();//get message to send to client

               pwPrintWriter.println(msgToClientString);//send message to client with PrintWriter
               pwPrintWriter.flush();//flush the PrintWriter
               System.out.println("Please enter something to send back to client..");
          }//end while
          } catch(Exception ex) {
            System.out.println(ex.getMessage());
        }
     }//end run
}

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