operating system

/** * An echo server listening on port 6007. This server reads from the client * and echoes back the result. */ import java.net.*; import java.io.*; public class EchoServer { //Your code is here public static void main(String[] args) throws IOException { ServerSocket server = new ServerSocket(1000); while (true) { Socket client = server.accept(); BufferedReader r = new BufferedReader(new InputStreamReader(client.getInputStream())); PrintWriter w = new PrintWriter(client.getOutputStream(), true); w.println("Welcome to Echo Server. Enter 'bye' to quit."); String line; do { line = r.readLine(); System.out.println(line); if ( line != null ) w.println(line); } while ( !line.trim().equalsIgnoreCase("bye") ); client.close(); } } }