?? server.java
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/* * To change this template, choose Tools | Templates * and open the template in the editor. */import java.io.*;import java.net.*;/** * * @author admin */public class server { private static ServerSocket servSock; private static final int PORT = 5000 ; public static void main(String args[]) throws IOException{ System.out.println("Opening Port.....\n"); try{ servSock = new ServerSocket(PORT); }catch(IOException e){ System.out.println("Unable to attach to port"); System.exit(1); } do{ Socket client = servSock.accept(); ClientHandler handler = new ClientHandler(client); handler.start(); }while(true); }}class ClientHandler extends Thread{ private Socket client ; private BufferedReader in ; private PrintWriter out ; public ClientHandler(Socket socket){ client = socket ; try{ in = new BufferedReader(new InputStreamReader(client.getInputStream())); out = new PrintWriter(client.getOutputStream(),true); }catch(IOException e){ e.printStackTrace(); } } public void run(){ try{ String received ; do{ received = in.readLine(); System.out.println(received); out.println("ECHO : " + received); }while(!received.equals("QUIT")); }catch(IOException e){ e.printStackTrace(); } finally{ try{ if (client != null){ System.out.println("Closing down connection"); client.close(); } }catch(IOException e){ e.printStackTrace(); } } }}
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