import java.io.*;
import java.net.*;
public class EchoClient {
public static void main(String[] args) throws IOException {
Socket echoSocket = null;
PrintWriter out = null;
BufferedReader in = null;
// get hostname
BufferedReader stdIn = new
BufferedReader(new InputStreamReader(System.in));
String userInput;
System.out.print ("Enter hostname: ");
userInput = stdIn.readLine();
try {
echoSocket = new Socket(userInput, 9999);
out = new PrintWriter(echoSocket.getOutputStream(), true);
in = new BufferedReader
(new InputStreamReader(echoSocket.getInputStream()));
} catch (UnknownHostException e) {
System.err.println("Don't know about host: " + userInput + ".");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to: " +
userInput + ".");
System.exit(1);
}
while ((userInput = stdIn.readLine()) != null) {
out.println(userInput);
System.out.println("echo: " + in.readLine());
}
out.close();
in.close();
stdIn.close();
echoSocket.close();
}
}